SPDR Dow Jones REIT ETF (RWR 0.02%) is an fund that consists of some of the largest equity REITs in the U.S, but is it a good long-term holding? In this segment of The Motley Fool's financials-focused show, Where the Money Is, banking analysts Matt Koppenheffer and David Hanson take a question from their mailbag about the REIT ETF.