Here’s my summary of market sentiment right now. If investors owned as much of their wealth in commodity exchange-traded funds (ETFs) as they do in S&P 500 Index ($SPX) ETFs, what’s been happening since late last year would be dominating the news and dinner table conversations. One glance at performance over two distinct time frames — one month and six months — tells the story. There’s lots of variability. And very recently, perhaps the beginning of the end for the highest flyers in the commodity space. ...