AGNC Investment Corp. Depositary Shares Each Representing a 1/1000th Interest in a Share of 7.00% Series C Fixed-To-Floating Rate Cumulative Redeemable Preferred Stock. Replay the stock market charts of AGNCN day by day, back to 2003. Open long and short positions without spending any money. AGNC Investment Corp is an internally-managed real estate investment trust. It invests in agency mortgage-backed securities on a leveraged basis, financed through collateralized borrowings structured as repurchase agreements.