Changes in market conditions can impact the REIT's big-time dividend.AGNC Investment (AGNC -3.56%) is a leader in investing in the Agency residential mortgage-backed securities (MBS) market (i.e., MBS protected from credit losses by government agencies like Fannie Mae). The company has a massive MBS portfolio (over $71.8 billion). It also has extensive experience navigating the MBS market and can tell when changes are in the air. It sees the Federal Reserve's recent rate cut as a catalyst for a big change i ...