Stocks Roundup: American Capital Mortgage Investment Crp (NASDAQ:MTGE), Eagle Rock Energy Partners, L.P. (NASDAQ:EROC), PDL BioPharma Inc. (NASDAQ:PDLI), China Techfaith Wireless Comm. Tech. Ltd (NASDAQ:CNTF) (Techsonian) American Capital Mortgage Investment Crp (NASDAQ:MTGE) opened its shares at the price of $17.99 for the day. Its closing price was $18.70 after gaining +4.12% for the day. The company traded with the total volume of 1.14 million shares, while its average trading volume remained 1.17 million shares. American Capital Mortgage Investment Corp. was formed to invest in and manage a leveraged portfolio of agency mortgage investments, non-agency mortgage investments and other mortgage-related investments.