3M Co.'s stock tumbled 7.1% in morning trade Tuesday, after what is shaping up to be the most disappointing quarterly earnings report 10 1/2 years. The $15.28 price decline was shaving about 105 points of the Dow Jones Industrial Average's price, as the Dow slumped 15 points. The industrial and consumer products manufacturer reported ahead of the open first-quarter results which were in line with expectations, but trimmed its full-year earnings guidance range. The stock is on track for the biggest one-day post-earnings percentage decline since it tumbled 8.6% on Oct. 19, 2007, after third-quarter 2009 results were reported.