For three weeks, the IBD 50 has been flat even as the major indexes have made new highs. The IBD 50 climbed 0.4% last week and has crawled up less than 0.1% so far this month. By comparison, the S&P 500 is up 2.2% and the Nasdaq 1.8% in November. Why the divergence? For answers, investors can turn to the many IBD 50 stocks that this month have gone sideways or erased early-November gains.