Longtime stock-market bull Jeremy Siegel warned that equities could be in for a correction amid a possible rate hike by the Federal Reserve next month. "The next six or seven weeks are going to be very rough," the well-known Wharton School finance professor told CNBC Monday afternoon. Jitters over a likely September rate hike combined with weaker corporate earnings due to falling oil prices, a strong dollar and seasonal weakness in late August and September ...