The major stock averages traded in tight fashion and finished flat Wednesday, a welcome session following Tuesday's high-volume upward burst. Leading stocks continued to show strength for the most part. The IBD 50 rose 0.4%. The Nasdaq composite was the only key index to finish with a loss, down just 0.1%. In other words, it kept virtually all of Tuesday's 1.3% gain 1. Wednesday's trading range was also thin. From intraday high to low, the range