NYSE Composite Index - 1994

The following graph plots the year-to-date performance of the index for 1994 compared to the probability calculated by a random walk model.

Initial Value: 2739.44 Hist. Volatility: 0.39% Annual Drift: 7% Final Value: 2653.37 Percentile: 10%
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 1994 (what's this?).