With the Dow Jones Industrial Average DJIA, -0.87% plunging 535 points, all 30 of the components are trading lower, led by the 6.1% tumbled in Exxon Mobil Corp.'s XOM, -1.61% stock. Of the components, 22 are down more than 1%, 13 are down more than 2%, 6 are down over 3%, and 2 are down over 4%, including Chevron Corp. CVX, -0.73% , which is shedding 4.9%. The biggest price decliner is Goldman Sachs Group Inc.'s stock GS, +0.01% , which dropped $9.53, or 3.5%. The best performer is Walmart Inc. shares WMT, -1.02% , which is up 0.4%. On thing to put the selloff in perspective, the Dow's point decline is greater than Black Monday, when it plunged 507.99 points on Oct. 19, 1987. But at that time, the percentage plunge was 22.61%, while the current percentage selloff of 2.04%.