Dow Jones Industrial Average - 2008

The following graph plots the year-to-date performance of the index for 2008 compared to the probability calculated by a random walk model.

Initial Value: 13264.8 Hist. Volatility: 0.77% Annual Drift: 7% Final Value: 8776.39 Percentile: 1%
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 2008 (what's this?).