Dow Jones industrial average gained 33.67 points, closing at 3,764.50 . . . N.Y.S.E.'s composite index up 2.02 to 252.62 . . . NASDAQ stock market composite index rose 8.61 to 721.04 . . . American Stock Exchange up 3.80 to 437.68 . . . Gold fell $1.80 to $383.00 on the Commodity Exchange in New York . . . The 30-year Treasury bond closed with a yield of 7.38 percent down from 7.55 late Thursday.