WARRANT WILL BE VOID IF NOT EXERCISED PRIOR TO 5

Exhibit 4.3

THIS WARRANT WILL BE VOID IF NOT EXERCISED PRIOR TO
5:00 P.M. NEW YORK CITY TIME, NOVEMBER 14 , 2012

PROSPECT ACQUISITION CORP.
Incorporated Under the Laws of the State of Delaware

CUSIP 74347T 111

WARRANT CERTIFICATE

This Warrant Certificate certifies that                            , or registered assigns, is the registered holder of                    warrants (the “Warrants” ) to purchase shares of Common Stock, $.0001 par value (the “Common Stock”), of Prospect Acquisition Corp., a Delaware corporation (the “Company” ). Each Warrant entitles the holder, upon exercise during the period set forth in the Warrant Agreement referred to below, to purchase from the Company that number of fully paid and non-assessable shares of Common Stock (each, a “Warrant Share” ) as set forth below at the exercise price (the “Exercise Price” ) as determined pursuant to the Warrant Agreement payable in lawful money of the United States of America upon surrender of this Warrant Certificate and payment of the Exercise Price at the office or agency of the Warrant Agent, but only subject to the conditions set forth herein and in the Warrant Agreement. Defined terms used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant Agreement.

Each Warrant is initially exercisable for one fully paid and non-assessable share of Common Stock. The number of Warrant Shares issuable upon exercise of the Warrants is subject to adjustment upon the occurrence of certain events set forth in the Warrant Agreement.

The initial Exercise Price per share of Common Stock for any Warrant is equal to $7.50 per share. The Exercise Price is subject to adjustment upon the occurrence of certain events set forth in the Warrant Agreement.

Warrants may be exercised only during the Warrant Exercise Period subject to the conditions set forth in the Warrant Agreement and to the extent not exercised by the end of such Warrant Exercise Period such Warrants shall become void.

Reference is hereby made to the further provisions of this Warrant Certificate set forth on the reverse hereof and such further provisions shall for all purposes have the same effect as though fully set forth at this place.

This Warrant Certificate shall not be valid unless countersigned by the Warrant Agent, as such term is used in the Warrant Agreement.

This Warrant Certificate shall be governed and construed in accordance with the internal laws of the State of New York, without regard to conflicts of laws principles thereof.

Countersigned:
CONTINENTAL STOCK TRANSFER & TRUST COMPANY,
as Warrant Agent

[Form of Warrant Certificate]
[Reverse]

The Warrants evidenced by this Warrant Certificate are part of a duly authorized issue of Warrants entitling the holder on exercise to receive shares of Common Stock, par value $0.0001 per share, of the Company (the “Common Stock” ), and are issued or to be issued pursuant to a Warrant Agreement dated as of November 14, 2007 (the “Warrant Agreement” ), duly executed and delivered by the Company to Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (the “Warrant Agent” ), which Warrant Agreement is hereby incorporated by reference in and made a part of this instrument and is hereby referred to for a description of the rights, limitation of rights, obligations, duties and immunities thereunder of the Warrant Agent, the Company and the holders (the words “holders” or “holder” meaning the registered holders or registered holder) of the Warrants. A copy of the Warrant Agreement may be obtained by the holder hereof upon written request to the Company. Defined terms used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant Agreement.

Warrants may be exercised at any time during the Warrant Exercise Period set forth in the Warrant Agreement. The holder of Warrants evidenced by this Warrant Certificate may exercise them by surrendering this Warrant Certificate, with the form of election to purchase set forth hereon properly completed and executed, together with payment of the Exercise Price as specified in the Warrant Agreement, at the principal corporate trust office of the Warrant Agent. In the