(Bloomberg) — Wall Street analysts are now almost universally bullish on Microsoft Corp. (MSFT), with Guggenheim upgrading the software company to buy from hold ahead of its quarterly results. The upgrade means nearly 99% of analysts tracked by Bloomberg currently recommend buying the stock. Of the 73 who follow Microsoft, the only holdout is Hedgeye Risk Management, which has a neutral rating on the company. None recommend selling. Most Read from Bloomberg Guggenheim’s upgrade reflects the optimism abo ...