Wall Street bets on higher Southern Union price By: MarketWatch July 05, 2011 at 12:30 PM EDT Investors bid shares of Southern Union above the latest buyout price as Wall Street bets on a loftier offer for the natural-gas-pipeline company. Read More >> Related Stocks: Buckeye Partners LP Enbridge Energy LP Energy Transfer Equity LP Enterprise Products Partners LP Kinder Morgan Macy's Magellan Midstream Partners LP Nustar Energy LP Plains All American Pipeline LP TransCanada Corporation Williams Companies