NEW YORK ( TheStreet) -- American Capital Agency Corp (Nasdaq: AGNC) is trading at unusually high volume Thursday with 27.1 million shares changing hands. It is currently at four times its average daily volume and trading down $1.04 (-3.6%) at $27.61 as of 1:40 p.m. ET. American Capital Agency has a market cap of $5.1 billion and is part of the financial sector and real estate industry. Shares are down 0.3% year to date as of the close of trading on Wednesday. American Capital Agency Corp. operates as a real estate investment trust (REIT). It invests in residential mortgage pass-through securities and collateralized mortgage obligations for which the principal and interest payments are guaranteed by a U.S. Government agency or U.S. The company has a P/E ratio of 3.8, equal to the average real estate industry P/E ratio and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates American Capital Agency as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, expanding profit margins and compelling growth in net income. However, as a counter to these strengths, we also find weaknesses including generally poor debt management, weak operating cash flow and disappointing return on equity. You can view the full American Capital Agency Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.