Secondary Stocks Rise; Volume Dips
LEAD: Secondary stocks showed more strength than blue chips yesterday as the market regained stability after last Friday's tumble. The American Stock Exchange composite index was up 2.91 points, or eight-tenths of 1 percent, to 378.07, and the Nasdaq composite index, the primary measure of over-the-counter stock movement, rose 3.35 points, or seven-tenths of 1 percent, to 463.28.