Shares of American Express and Salesforce are posting losses Friday morning, dragging the Dow Jones Industrial Average into negative territory. Shares of American Express
        AXP,
        -4.98%
       and Salesforce
        CRM,
        -2.38%
       have contributed to the index’s intraday decline, as the Dow
        DJIA,
        -0.84%
       was most recently trading 168 points, or 0.5%, lower. American Express’s shares have dropped $5.64, or 3.8%, while those of Salesforce are down $4.95 (2.4%), combining for an approximately 70-point drag on the Dow. Other components contributing significantly to the decline include JPMorgan Chase
        JPM,
        -1.63%,
       Microsoft
        MSFT,
        -1.37%,
       and Caterpillar
        CAT,
        -1.11%.
       A $1 move in any of the Dow’s 30 components equates to a 6.59-point swing.
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