NEW YORK (MarketWatch) -- If a bull market rally began when the stock market embarked on its six-week run higher, its more than 25% climb from its March lows has it about one-sixth of the way through the average bull run, says Standard and Poor's numbers cruncher Howard Silverblatt. "We have a substantial rally, but is it a sucker's rally -- or have we turned a corner?" asked Silverblatt, senior index analyst at S&P. He added that one would have to go back to 1938 to fine a 29-day stretch where the market has done as well as its recent winning streak. Since the market hit what could prove to be its bear market bottom on March 9 through Tuesday's close, Silverblatt counted 480 of the S&P 500 Index 500's issues gaining, and 20 of them down. http://www.marketwatch.com/news/sto...x?guid={8F21A558-997C-48E1-934B-F245F09C452A}