Walker & Dunlop (NYSE: WD) investors are running for the hills today after the company lowered guidance on loan volume for the quarter.

Walker & Dunlop is a commercial real estate lender that focuses on multifamily properties, such as apartment buildings. Walker & Dunlop makes the loans to developers of multifamily dwellings, then sells those loans to Fannie Mae and Freddie Mac.

Fannie Mae and Freddie Mac are fast approaching the cap in the number of loans they can take on, which has a direct impact on the number of loans Walker & Dunlop can sell. As a result, the company lowered guidance for third-quarter loan originations by a solid 20%, which has spooked investors.

Motley Fool analyst David Hanson believes this stock is trading relatively cheaply, at around 11 times earnings. Despite the headwinds from Fannie Mae and Freddie Mac, David thinks the long-term outlook for this stock is a positive one, as the family-run company has survived through three generations; its current CEO is Willy Walker, grandson of the co-founder.

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David Hanson owns shares of Walker & Dunlop. Erin Kennedy has no position in any stocks mentioned. The Motley Fool owns shares of Walker & Dunlop. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.