The DJIA rose 2.62% (+1,367 pts) on the month, and 87% of that gain came from just three stocks: MSFT, AMGN, CRM.
Read the latest market-close note: Nvidia and Goldman Sachs Lead a Narrow Advance as Energy and Staples Slide
Caterpillar and Nike moved almost identically (−7.14% vs −6.34%), yet CAT moved the DJIA 23.3× as much. In a price-weighted index, a higher-priced share simply outvotes a cheaper one.
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