The XLK rose 17.73% (+27.38 pts) over five years, and more than all of that gain came from just three stocks: NVDA, AAPL, AVGO.
Read the latest market-close note: Nvidia and Goldman Sachs Lead a Narrow Advance as Energy and Staples Slide
NVIDIA CORP and SUPER MICRO COMPUTER INC moved almost identically (+998.66% vs +951.68%), yet NVDA moved the XLK 464.0× as much. In a cap-weighted index, the bigger company's weight turns the same percentage move into far more points.
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