NEW YORK, Nov 22 (Reuters) - Bank shares weighed on stocks on Monday as Europe's smoldering debt crisis and fears of an insider trading probe in the United States sapped buying interest.
But the Nasdaq fared better than the Dow and the S&P 500 after an upgrade of chip maker SanDisk Corp by Robert W. Baird as well as upgrades of Amkor Technology Inc and Teradyne Inc by Citigroup.
The Dow Jones industrial average slipped 24.97 points, or 0.22 percent, to end unofficially at 11,178.58. The Standard & Poor's 500 Index dipped 1.89 points, or 0.16 percent, to finish unofficially at 1,197.84. The Nasdaq Composite Index added 13.90 points, or 0.55 percent, to close unofficially at 2,532.02. (Reporting by Angela Moon; Editing by Jan Paschal)