The XLF rose 67.83% (+22.12 pts) over three years in a broad advance: 67 of 76 stocks rose, with JPM out front at +3.69 points.
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BERKSHIRE HATHAWAY INC CL B and GLOBE LIFE INC moved almost identically (+49.98% vs +55.56%), yet BRK-B moved the XLF 168.7× 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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