RocketCap Smart Grid Stock Index© Updated for 31 JULY 09
This week, the RSGSI© the ROI was flat, as were the comparison indexes. The number of uncorrelated components increased this week, from 11 last week to 19 this week. Previously, the number of uncorrelated components has varied between 6 and 17  after each week’s 45 day trailing measurement. The volatility in last 45 day ROI annualization has been stable for several weeks at ~22%/YR, and it dropped this week to 21%/YR.
RSGSI© Update 7-31-09: 99 days annualized ROI
RSGSI© Portfolio Correlation Matrix: 45 Days Ending 7-31-09
Further Reading and Explanations
Introduction, definitions and meaning of the RocketCap Smart Grid Stock Index©