Why S&P 1500 May Signal Stock Rally Has Peaked By: CNBC.com News January 25, 2013 at 12:26 PM EST Wall Street's bull is taking a run at the psychologically important 1,500 marker, but that's a level that could also trigger a pause, analysts say. Read More >> Related Stocks: Apple Citigroup Exxon Mobil Halliburton Co Kimberly-Clark Oshkosh Truck Corp Procter & Gamble