The Dow Jones industrial average rebounded strongly, as strong profits reports pushed the Dow upward by 57.45 points to close at 5,124.35. The New York Stock Exchange composite index also finished in the positive column, gaining 0.86 to end the day at 326.15. On the Big Board, advancers led decliners 1,392 to 991, with 720 unchanged. Volume was heavy, with 449, 893,603 million shares traded. The technology-heavy Nasdaq finished the day up 8.94 points to close at 1007.24. The Standard & Poor's 500 stocks gained 1.87 to end the day at 608.24. The American Stock Exchange market value index was the only index to fall today, losing 4.16 to close at 529.05. In London gold closed at $397.70, off $0.05.