Nobody likes to begin Monday morning hearing bad news, but that’s what happened this week to investors when Wolfe Research analyst Andrew Rosivach downgraded four real estate investment trusts (REITs) to kick off the new market week. Analysts carry a lot of weight, and when one or more downgrades a stock, it can cause shares to drop by several percentage points in just a few days. For example, on March 23, Barclays Investment Bank analyst Anthony Powell downgraded SL Green Realty Corp. (NYSE: SL