Failure to grow market share translates into a low or falling S/TA. Calculate Z-scores for WorldCom using annual 10-K financial reports for years ending Dec. 31, 1999, 2000, and 2001.You'll find ...

In investing and trading, Z-scores are measures of an instrument's variability and can be used by traders to help determine volatility. A Z-Score is a statistical measurement of a score's ...