The big RadioShack news yesterday was that Goldman Sachs Group bought 15 million shares of RadioShack, raising its stake in the company to 13 percent. Very bullish, right? Kinda. As Deal Journal points out, while some at Sachs were buying, analysts there weren’t as impressed. Researcher Matthew Fassler formally downgraded the stock from “buy” to “neutral.” The RadioShack case at Goldman Sach is either a) proof that the investing side and the analyst side are separated like church and state, or b) nobody likes Mathew Fassler.