FORM OF MORTGAGE LOAN PURCHASE AGREEMENT

Exhibit 99.1

NYMT SECURITIES CORPORATION,

as Purchaser,

and

NEW YORK MORTGAGE FUNDING, LLC,

as Seller,

MORTGAGE LOAN PURCHASE AGREEMENT

Dated as of [                    ], 2005

Mortgage Loans

TABLE OF CONTENTS

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MORTGAGE LOAN PURCHASE AGREEMENT (the “Agreement”), dated as of [                    ], 2005, between NEW YORK MORTGAGE FUNDING, LLC (the “Seller”) and NYMT SECURITIES CORPORATION (the “Purchaser” or the “Depositor”).

W I T N E S S E T H

WHEREAS, the Seller is the owner of the notes or other evidence of indebtedness (the “Mortgage Notes”) so indicated on Schedule I hereto referred to below, and Related Documents (as defined below) (collectively, the “Mortgage Loans”);

WHEREAS, the Seller as of the date hereof owns the mortgages (the “Mortgages”) on the properties (the “Mortgaged Properties”) securing such Mortgage Loans, including rights to (a) any property acquired by foreclosure or deed in lieu of foreclosure or otherwise and (b) the proceeds of any insurance policies covering the Mortgage Loans or the Mortgaged Properties or the obligors on the Mortgage Loans;

WHEREAS, the parties hereto desire that the Seller sell the Mortgage Loans to the Purchaser pursuant to the terms of this Agreement;

WHEREAS, the Purchaser will assign to New York Mortgage Trust, Series 2005-[    ] (the “Trust” or the “Issuer”) all of its rights against the Seller pursuant to this Agreement as described herein pursuant to the terms of a Transfer and Servicing Agreement dated as of [                    ], 2005 (the “Transfer and Servicing Agreement”) among the Purchaser, the Trust, [                                ], as master servicer and trust administrator, [                                ], as indenture trustee, NYMT Servicing Corporation, as servicer, the Seller, and [                                ], as subservicer; and

WHEREAS, the Trust will pledge to the Indenture Trustee all of its rights against the Seller pursuant to this Agreement and the Transfer and Servicing Agreement as described herein and therein, respectively, pursuant to the terms of an Indenture dated as of [                    ], 2005 (the “Indenture”) among the Trust, the Trust Administrator and the Indenture Trustee.

NOW, THEREFORE, in consideration of the mutual covenants herein contained, the parties hereto agree as follows:

ARTICLE I

DEFINITIONS

SECTION 1.1. Definitions . All capitalized terms used but not defined herein shall have the meanings assigned thereto in the Transfer and Servicing Agreement.

ARTICLE II

SALE OF MORTGAGE LOANS; PAYMENT OF PURCHASE PRICE

SECTION 2.1. Sale of Mortgage Loans . The Seller, concurrently with the execution and delivery of this Agreement, does hereby sell, assign, set over, and otherwise convey to the Purchaser, without recourse, all of its right, title and interest in (other than any servicing rights

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relating to the Mortgage Loans), to and under the following, whether now existing or hereafter acquired and wherever located: (i) the Mortgage Loans, including the related Cut-off Date Balance, all payments in respect of the Mortgage Loans received after the Cut-off Date (exclusive of payments in respect of principal and interest on the delinquent Mortgage Loans due prior to the Cut-off Date and received thereafter); (ii) property which secured a Mortgage Loan and which has been acquired by foreclosure or deed in lieu of foreclosure; (iii) the interest of the Seller in any insurance policies in respect of the Mortgage Loans; (iv) all rights under any guaranty and/or additional security agreement executed in connection with a Mortgage Loan; and (v) all proceeds of the foregoing.

SECTION 2.2. Obligations of Seller Upon Sale . In connection with any transfer pursuant to Section 2.1 hereof, the Seller further agrees, at its own expense, on or prior to the Closing Date, (a) to indicate in its books and records, other than for accounting and federal income tax purposes, that the Mortgage Loans have been sold to the Owner Trustee, as assignee of the Purchaser pursuant to this Agreement and (b) to deliver to the Purchaser a computer file containing a true and complete list of all such Mortgage Loans specifying for each such Mortgage Loan, as of the related Cut-off Date, (i) its account number and (ii) the Cut-off Date Balance. Such file shall also be marked as Schedule I to this Agreement and is hereby incorporated into and made a part of this Agreement.

In connection with any conveyance by the Seller, the Seller shall on behalf of the Purchaser, the Depositor and the Issuer deliver to, and deposit with the Custodian, as custodian on behalf of the Indenture Trustee, as assignee of the Purchaser, on or before the Closing Date (except as noted below) the documents or instruments with respect to each Mortgage Loan (collectively, the “Mortgage File” or, other than the Mortgage Note, the “Related Documents”) listed in Section 2.01(b) of the Transfer and Servicing Agreement.

The parties hereto intend that the transaction set forth herein be a sale for all purposes other than accounting and federal income tax purposes by the Seller to the Purchaser of all the Seller’s right, title and interest in and to the Mortgage Loans and other property described above. In the event the transaction set forth herein is deemed not to be a sale, the Seller hereby grants to the Purchaser a security interest in all of the Seller’s right, title and interest in, to and under the Mortgage Loans and the Related Documents and other property described above, whether now existing or hereafter created, to secure all of the Seller’s obligations hereunder; and this Agreement shall constitute a security agreement under applicable law. The parties hereto intend that for federal income tax purposes the transaction set forth herein be treated not as a sale, but as though the Seller retained the tax ownership of the Mortgage Loans through the Trust as a disregarded entity with the Seller as the borrower under the Notes.

SECTION 2.3. Payment of Purchase Price for the Mortgage Loans . In consideration of the sale of the Mortgage Loans from the Seller to the Purchaser on the Closing Date, the Purchaser agrees to pay to the Seller on the Closing Date by transfer of immediately available funds, an amount equal to $[                    ] (the “Purchase Price”). The Seller shall transfer to the Seller or one of its Affiliates on the Closing Date the Ownership Certificate. The Seller shall pay, and be billed directly for, all expenses incurred by the Purchaser in connection with the issuance of the Notes, including, without limitation, printing fees incurred in connection with the prospectus relating to the Notes, blue sky registration fees and expenses, fees and expenses of

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[Counsel to the Issuer], fees of the rating agencies requested to rate the Notes, accountant’s fees and expenses, Custodian fees, loan level due diligence fees, the fees and expenses of the Indenture Trustee and the Owner Trustee and other out-of-pocket costs, if any.

ARTICLE III

REPRESENTATIONS AND WARRANTIES; REMEDIES FOR BREACH

SECTION 3.1. Seller Representations and Warranties . The Seller represents and warrants to the Purchaser as of the Closing Date that:

(i) the Seller is a Delaware limited liability company, duly organized, validly existing and in good standing under the laws of the State of Delaware, and has the corporate power to own its assets and to transact the business in which it is currently engaged. The Seller is duly qualified to do business as a foreign limited liability company and is in good standing in each jurisdiction in which the character of the business transacted by it or any properties owned or leased by it requires such qualification and in which the failure so to qualify would have a material adverse effect on the business, properties, assets, or condition (financial or other) of the Seller;

(ii) the Seller has the entity power and authority to make, execute, deliver and perform this Agreement and all of the transactions contemplated under the Agreement, including the power, authority and capacity to hold and sell each Mortgage Loan, and has taken all necessary entity action to authorize the execution, delivery and performance of this Agreement. When executed and delivered, this Agreement will constitute the legal, valid and binding obligation of the Seller enforceable in accordance with its terms, except as enforcement of such terms may be limited by bankruptcy, insolvency or similar laws affecting the enforcement of creditors’ rights generally and by the availability of equitable remedies;

(iii) the Seller is not required to obtain the consent of any other party or any consent, license, approval or authorization from, or registration or declaration with, any governmental authority, bureau or agency in connection with the execution, delivery, performance, validity or enforceability of this Agreement, except for such consent, license, approval or authorization, or registration or declaration, as shall have been obtained or filed, as the case may be, prior to the Closing Date;

(iv) it is not in violation of, and the execution, delivery and performance of this Agreement by the Seller will not violate, any provision of any existing law or regulation or any order or decree of any court or any order or decree of any federal, state or municipal governmental agency applicable to the Seller or any provision of the articles of organization or operating agreement of the Seller, or constitute a material breach of any mortgage, indenture, contract or other agreement to which the Seller is a party or by which the Seller may be bound;

(v) no litigation or administrative proceeding of or before any court, tribunal or governmental body is currently pending, or to the knowledge of the Seller threatened, against the Seller or any of its properties or with respect to this Agreement which in the opinion of the Seller has a reasonable likelihood of resulting in a material adverse effect on the transactions contemplated by this Agreement;

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(vi) the Seller has been organized in conformity with the requirements for qualification as a “qualified REIT subsidiary” (“QRS”) of a REIT and currently qualifies as a QRS; the Seller has elected to be treated as a QRS for federal income tax purposes; and the Seller has operated and will continue to operate in a manner that will enable it to continue to maintain its current qualification as a QRS;

(vii) the Mortgage Loans are not being transferred by the Seller with any intent to hinder, delay or defraud any creditors of the Seller;

(viii) immediately prior to the delivery of each Mortgage Loan, the related Mortgage was held of record solely for the account of the Seller and the Seller was the owner of the related Mortgage Note, in the event that it retains record title, it shall retain such record title to each Mortgage, each related Mortgage Note and the related Mortgage Files with respect thereto in trust for the Purchaser or its assignee as the owner thereof and only for the purpose of servicing or supervising the servicing of each such Mortgage Loan;

(ix) the consummation of the transactions contemplated by this Agreement are in the Seller’s ordinary course of business, and the transfer, assignment and conveyance of the Mortgage Notes and the Mortgages by it pursuant to this Agreement are not subject to the bulk transfer or any similar statutory provisions; and

(x) the written statements, reports and other documents prepared and furnished or to be prepared and furnished by the Seller pursuant to this Agreement or in connection with the transactions contemplated hereby taken in the aggregate do not contain any untrue statement of material fact or omit to state a material fact necessary to make the statements contained therein not misleading.

It is understood and agreed that the representations and warranties set forth in this Section 3.1 shall survive the sale and assignment of the Mortgage Loans to the Purchaser.

SECTION 3.2. Seller Representations and Warranties Relating to the Mortgage Loans . The Seller represents and warrants to the Purchaser as of the Closing Date that:

(i) the information set forth in the Mortgage Loan Schedule relating to the Mortgage Loans is true and correct in all material respects as of the related Cut-off Date;

(ii) as of the Closing Date, the Mortgage File relating to each Mortgage Loan contains each of the documents and instruments specified to be included therein;

(iii) the Seller has received a written acknowledgment from the Custodian that the Custodian is acting solely as agent of the Indenture Trustee;

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(iv) each Mortgaged Property is improved by a one- to four-family single family residential dwelling. No Mortgaged Property is a mobile home. No Mortgaged Property securing any Mortgage Loans is a manufactured home;

(v) each Mortgage Loan is a closed-end mortgage loan and all amounts due under the related Mortgage Note have been advanced. Each Mortgage Loan has an original term to maturity from the date on which the first Scheduled Payment is due of not more than 30 years. Each mortgage note calls for a scheduled payment of principal and interest that, once it enters its amortization period, is sufficient to fully amortize the original Principal Balance of the Mortgage Loan in equal monthly installments by its maturity date;

(vi) each Mortgage Note in respect of a Mortgage Loan provides for level monthly payments sufficient to fully amortize the principal balance of such Mortgage Note on its maturity date, except for no more than [            ]% of the Mortgage Loans (by Cut-off Date Balance) which provide for payments of interest only during the [first] five years of the Mortgage Loan before adjusting to a fully amortizing Mortgage Loan over the remaining term;

(vii) each lien that attached to a Mortgage Loan immediately prior to the transfer and assignment contemplated in this Agreement has been released and immediately prior to the transfer and assignment contemplated in this Agreement, the Seller held good, marketable and indefeasible title to, and was the sole owner and holder of, each Mortgage Loan subject to no liens; the Seller has full right and authority under all governmental and regulatory bodies having jurisdiction over the Seller, subject to no interest or participation of, or agreement with, any party, to sell and assign the same pursuant to this Agreement; and immediately upon the transfer and assignment therein contemplated, the Seller shall have transferred all of its right, title and interest in and to each Mortgage Loan to the Purchaser;

(viii) the Mortgage Notes constitute “instruments” within the meaning of the New York UCC;

(ix) the Seller has not authorized the filing of and is not aware of any financing statements against the Seller that include a description of collateral covering the Mortgage Loans other than any financing statement relating to the security interest granted to the Purchaser under this Agreement. The Seller is not aware of any judgment or tax lien filings against it;

(x) except in the case of Cooperative Loans, if any, each Mortgage requires all buildings or other improvements on the related Mortgaged Property to be insured by a generally acceptable insurer against loss by fire, hazards of extended coverage and such other hazards as are customary in the area where the related Mortgaged Property is located pursuant to insurance policies conforming to the requirements of the guidelines of FNMA or FHLMC. If upon origination of the Mortgage Loan, the Mortgaged Property was in an area identified in the Federal Register by the Federal Emergency Management Agency as having special flood hazards (and such flood insurance has been made

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available) a flood insurance policy meeting the requirements of the current guidelines of the Federal Flood Insurance Administration is in effect which policy conforms to the requirements of the current guidelines of the Federal Flood Insurance Administration. Each Mortgage obligates the related Mortgagor thereunder to maintain the hazard insurance policy at the Mortgagor’s cost and expense, and on the Mortgagor’s failure to do so, authorizes the holder of the Mortgage to obtain and maintain such insurance at such Mortgagor’s cost and expense, and to seek reimbursement therefor from the Mortgagor. Where required by state law or regulation, each Mortgagor has been given an opportunity to choose the carrier of the required hazard insurance; provided the policy is not a “master” or “blanket” hazard insurance policy covering the common facilities of a planned unit development. The hazard insurance policy is the valid and binding obligation of the insurer, is in full force and effect, and will be in full force and effect and inure to the benefit of the Purchaser upon the consummation of the transactions contemplated by this Agreement;

(xi) each Mortgage has not been satisfied, cancelled, subordinated or rescinded, in whole or in part, and (a) the Mortgaged Property has not been released from the lien of the Mortgage, in whole or in part, nor has any instrument been executed that would effect any such release, cancellation, subordination or rescission and (b) no Mortgagor has been released, in whole or in part, from its obligations under the related Mortgage Note;

(xii) each Mortgage evidences a valid, subsisting, enforceable and perfected first lien on the related Mortgaged Property. The lien of the Mortgage is subject only to: (1) liens of current real property taxes and assessments not yet due and payable and, if the related Mortgaged Property is a condominium unit, any lien for common charges permitted by statute, (2) covenants, conditions and restrictions, rights of way, easements and other matters of public record as of the date of recording of such Mortgage acceptable to mortgage lending institutions in the area in which the related Mortgaged Property is located and specifically referred to in the lender’s Title Insurance Policy or attorney’s opinion of title and abstract of title delivered to the originator of such Mortgage Loan, and (3) such other matters to which like properties are commonly subject which do not, individually or in the aggregate, materially interfere with the benefits of the security intended to be provided by the Mortgage. Any security agreement, chattel mortgage or equivalent document related to, and delivered to the Indenture Trustee in connection with, a Mortgage Loan establishes a valid, subsisting and enforceable first lien on the property described therein and the Purchaser has full right to sell and assign the same to the Indenture Trustee;

(xiii) except with respect to liens released immediately prior to the transfer herein contemplated, each Mortgage Note and related Mortgage have not been assigned or pledged and immediately prior to the transfer and assignment herein contemplated, the Seller was the sole owner and holder of, each Mortgage Loan subject to no liens, charges, mortgages, claims, participation interests, equities, pledges or security interests of any nature, encumbrances or rights of others (collectively, a “Lien”); the Seller has full right and authority under all governmental and regulatory bodies having jurisdiction over the Seller, subject to no interest or participation of, or agreement with, any party, to sell and

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assign the same pursuant to this Agreement; and immediately upon the transfer and assignment herein contemplated, the Seller shall have transferred all of its right, title and interest in and to each Mortgage Loan to the Purchaser (or its assignee);

(xiv) no Mortgage Loan was more than one calendar month delinquent as of the Cut-off Date; the Seller has not advanced funds to, or induced, solicited or knowingly received any advance of funds from a party other than the owner of the Mortgaged Property subject to the Mortgage, directly or indirectly, for the payment of any amount required by the Mortgage Loan;

(xv) there is no delinquent tax, fee or assessment lien on any Mortgaged Property, and each Mortgaged Property is free of material damage and is in good repair;

(xvi) no Mortgage Loan is subject to any right of rescission, set-off, counterclaim or defense, including the defense of usury, nor will the operation of any of the terms of any Mortgage Note or Mortgage, or the exercise of any right thereunder, render either the Mortgage Note or the Mortgage unenforceable in whole or in part, or subject to any right of rescission, set-off, counterclaim or defense, including the defense of usury, and no such right of rescission, set-off, counterclaim or defense has been asserted with respect thereto;

(xvii) none of the Mortgage Loans are retail installment contracts for goods or services or are home improvement loans for goods or services, which would be either “consumer credit contracts” or “purchase money loans” as such terms are defined in 16 C.F.R. § 433.1;

(xviii) no Mortgagor has or will have a claim or defense against the Seller or any assignor or assignee of the Seller under any express or implied warranty with respect to goods or services provided in connection with any Mortgage Loan;

(xix) the Mortgage, the Mortgage Note and the other Related Documents contain the entire agreement of the parties and all obligations of the Seller under the related Mortgage Loan, and no other agreement defines, modifies or expands the obligations of the Seller under the Mortgage Loan;

(xx) there is no mechanics’ lien or claim for work, labor or material affecting any Mortgaged Property which is or may be a lien prior to, or equal or coordinate with, the lien of the related Mortgage, and no rights are outstanding that under law could give rise to such a lien except those which are insured against by the title insurance policy referred to in Section 3.02(xxii) below;

(xxi) each Mortgage Loan at the time it was made complied with, and each Mortgage Loan at all times was serviced in compliance with, in each case, in all material respects, applicable local, state and federal laws and regulations, including, without limitation, usury, equal credit opportunity, consumer credit, truth-in-lending, disclosure laws and predatory and abusive lending laws;

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(xxii) with respect to each Mortgage Loan, either (a) a lender’s title insurance policy, issued in standard American Land Title Association or California Land Title Association form, or other form acceptable in a particular jurisdiction, by a title insurance company authorized to transact business in the state in which the related Mortgaged Property is situated in an amount at least equal to the original principal balance of such Mortgage Loan insuring the mortgagee’s interest under the related Mortgage Loan as the holder of a valid first mortgage lien of record on the real property described in the Mortgage, subject only to the exceptions of the character referred to in Section 3.02(xii) above, was valid and in full force and effect on the date of the origination of such Mortgage Loan and as of the Closing Date or (b) an attorney’s opinion of title was prepared in connection with the origination of such Mortgage Loan;

(xxiii) the improvements upon each Mortgaged Property are covered by a valid and existing hazard insurance policy with a generally acceptable carrier that provides for fire and extended coverage representing coverage described in the Section of the Transfer and Servicing Agreement entitled “Standard Hazard and Flood Insurance Policies”;

(xxiv) a flood insurance policy is in effect with respect to each Mortgaged Property with a generally acceptable carrier in an amount representing coverage described in the Section of the Transfer and Servicing Agreement entitled “Standard Hazard and Flood Insurance Policies”, if and to the extent required by such Section of the Transfer and Servicing Agreement;

(xxv) each Mortgage Note and the related Mortgage are genuine, and each Mortgage and Mortgage Note is the legal, valid and binding obligation of the related Mortgagor and is enforceable in accordance with its terms, except only as such enforcement may be limited by bankruptcy, insolvency, reorganization, moratorium or other similar laws affecting the enforcement of creditors’ rights generally and by general principles of equity (whether considered in a proceeding or action in equity or at law), and all parties to each Mortgage Loan and the Mortgagee had full legal capacity to execute all Mortgage Loan documents and to convey the estate therein pu