Stocks delivered moderate gains Thursday as volume picked up on both major exchanges. The S&P 500 and the Nasdaq rose 0.6% and 0.4%, respectively. The IBD 50 added 0.7%. Volume rose about 12% on the NYSE and 5% on the Nasdaq. The Dow Jones industrial average extended its win streak to 10 sessions in a row, the best since November 1996. The streak might not mean much. Some of the gains in today's streak have been tiny, even fractional. Still,