The XLF rose 2.49% (+1.33 pts) so far this quarter in a broad advance: 57 of 76 stocks rose, with V out front at +0.31 points.
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VISA INC CLASS A SHARES and WR BERKLEY CORP moved almost identically (+7.27% vs +6.50%), yet V moved the XLF 31.3× 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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