Last Friday the U.S. stock market was under the sign of the increased caution, which led the major stock indices to close near zero. The trading week that starts today will be rich in corporate events, as five of the "Magnificent Seven" report on the last quarter this week. As the weight of these companies in the S&P 500 index is about 20 percent, we can expect these reports to drive the market this week and, possibly, the next one.