Moneybox Step Away From CNBC If you want to make money in the stock market, change this channel. Photo illustration by Slate. Images via Diy13/iStock/Getty Images Plus and CNBC/YouTube. If you wanted to design a financial channel that would cause investors to underperform the stock market, you’d create CNBC, NBC’s financial counterpart that runs on cable news and ostensibly tries to make viewers better investors. You’d make it sober and rational (well, there is Jim Cramer, but we’ll get to him l...