Dow Jones Industrial Average - 1992

The following graph plots the year-to-date performance of the index for 1992 compared to the probability calculated by a random walk model.

Initial Value: 3168.83 Hist. Volatility: 1.17% Annual Drift: 7% Final Value: 3301.11 Percentile: 50%
Click on the image for the high resolution version.

The high to date and low to date prices of the stock plotted against a random walk model for 1992 (what's this?).