Royal Dutch Shell plc (ADR) - 2009  (Inactive Symbol)

The following graph plots the year-to-date performance of the stock for 2009 compared to the probability calculated by a random walk model.

Initial Value*: $33.3 Hist. Volatility: 3.42% Annual Drift: 7% Final Value*: $40.1 Percentile: 67%
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 2009 (what's this?).