Another sleepy August session. The major indexes slipped. Trading volume was thin. Most stocks barely moved. But underneath the surface, three important stories are developing: SOX Semiconductors are back in a bull market. $Philadelphia Semiconductor Index(SOX)$ Oil is climbing again. The 30-year Treasury yield just hit a level not seen since 2007. That combination deserves attention. THE MARKET LOOKED WEAK, BUT THE DETAILS MATTER Monday's numbers: Dow Jones: -0.51%. $S&P 500(.SPX)$ : -0.52%. $NASDAQ(.IXIC)$ : -0.32% At first glance, nothing dramatic. But trading volume tells the real story. Only 13.83 billion shares changed hands. The year-to-date average,