4 Stocks Stifel Just Upgraded By: Benzinga via Benzinga May 04, 2015 at 12:38 PM EDT Analysts at Stifel on Monday upgraded shares of Twitter Inc (NYSE: TWTR), The Madison Square Garden Co (NASDAQ: MSG), Buckeye Partners, ... Read More >> Related Stocks: Brixmor Property Group Inc Buckeye Partners LP Twitter, Inc.