Armour Residential (ARR) is a mortgage REIT focused on Agency Mortgage Backed Securities (MBS). There has been alot of activity in this space recently, ever since the Federal Reserve declared to keep the Fed Funds rate near zero through mid-2013. One thing that's interesting about ARR, however, is the level of hedge funds that reported new positions in this stock in Q2 (as of June 30):
(Click charts to expand)
Looking at the top filers, Millennium, Pine River (a hedge fund focused on MBS), Bridgeway Capital (a quant-shop with $2.7BN in AUM), Geode Capital (a Fidelity spin-off), Renaissance & DE Shaw. Granted, these are relatively small positions for some of the larger guys but the broad level of interest in Q2 is worth noting.
Along with alot of other mREITs, ARR sold off last week, but it's since rebounded somewhat and is currently yielding 19%.