In this video, Matt Koppenheffer reviews Invesco's (IVR 0.32%) latest earnings report and, more importantly, its current investment strategy.  As agency-backed mortgage securities become more expensive due to Federal Reserve purchases, Invesco has shifted to non-agency mortgage investments. This reflects increased confidence in the American economy and housing market. Invesco isn't alone. Annaly Capital Management (NLY 0.36%) is also in the process of making a shift in its investment portfolio. While we've heard a lot of talk about improvement in the housing market and economy, these moves by Invesco and Annaly suggest that confidence in that conclusion may be growing.