The Dow Jones Industrial Average fell 876 points today, as investors digested a bad inflation report from Friday and then turned their attention to the Federal Reserve's June meeting, which starts tomorrow. The Consumer Price Index (CPI), which tracks a basket of daily goods and services and is one data point investors use to measure inflation, was up 8.6% year over year as of May. In the Dow, the aviation company Boeing (NYSE: BA) was the index's worst performer, finishing the day close to 9% down.