PowerShares QQQ Trust, Series 1 (ETF) - 2006  (Inactive Symbol)

The following graph plots the year-to-date performance of the stock for 2006 compared to the probability calculated by a random walk model.

Initial Value*: $37.0 Hist. Volatility: 0.79% Annual Drift: 7% Final Value*: $39.6 Percentile: 54%
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 2006 (what's this?).