Dow stocks with the biggest negative point impact this week

A trader works on the floor of the New York Stock Exchange.
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The Dow Jones industrial average is down nearly 500 points this week, or 3 percent—its second worst weekly loss in two years.

Check out which stocks are responsible for about half of the point losses in the blue-chip index this week.

Ticker Company Price WTD % Chg. WTD Dollar Impact
CVXChevron Corporation$127.60-4.23-38.7
AXPAmerican Express Company$86.00-6.45-38.2
GSGoldman Sachs Group, Inc.$169.80-3.04-35.8
MMM3M Company$139.70-3.67-35.1
IBMInternational Business Machines Corporation$189.00-2.7-35
CATCaterpillar Inc.$99.90-4.6-31.9
XOMExxon Mobil Corporation$98.60-4.31-29.5

--CNBC's Giovanny Moreano contributed to this report.