This weekend we pointed out some of the difficulties and mixed signals that arise from a Narrowly Focused Market. Monday fit that description as AI led the way down, and then that completely reversed on Tuesday as AI helped the market regain Monday’s losses in the Nasdaq 100. Apparently, Tuesday was one of the worst breadth days for the S&P 500 in decades (the index gained 0.4% with just over 100 stocks trading higher on the day). The Nasdaq 100 gained about 0.5% in the last half hour or so of trading yesterday, presumably ahead of some semiconductor earnings. Those ... One Trick Pony?