Most probably the fear of major negative impact to the economy if we go over the fiscal cliff. RSO 100% deals in commercial real estate securities and businesses. This sector will suffer in a double dip recession scenario.
REIT's are tanking today. Rso gets lumped in with the agency REIT's when there's a pull back in them, even though what effects them has nothing to do RSO. Also people are afraid of risk right now. That's my guess.