Dow Jones Industrial Average - 2010

The following graph plots the year-to-date performance of the index for 2010 compared to the probability calculated by a random walk model.

Initial Value: 10428 Hist. Volatility: 1.29% Annual Drift: 7% Final Value: 11577.5 Percentile: 60%
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 2010 (what's this?).