Since 2020, the Magnificent 7 stocks have surged an average of 640%, far outpacing the S&P 500's 100% gain, Jefferies said Friday. 

$NVDA led with a 2,200% rise, while $AMZN, the weakest, gained about 140%. 

Jefferies' Mag7 model assesses growth, revisions, sentiment, momentum, valuation, yield, ROIC, and R&D versus capex. 

NVDA ranks highest, Google is the top anti-momentum value play, MSFT ranks lowest, and TSLA is the most volatile with extreme factor exposure.