Other closely watched indexes fared worse. The Dow Jones Transportation Index slid 4.27% and the Russell 2000 Index of small-capitalization stocks declined 4.02%.

其他密切相关的股指都表现更糟，道琼斯运输业股票价格平均指数下滑4.27%，小型资本额企业的罗素指数下跌4.02%。

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The January effect is the tendency of low price, small-capitalization stocks to outperform in January.

FORBES: Why There May Be A January Effect For Large-Cap Stocks

The Russell 2000 index of small-capitalization stocks added 0.3%, also its highest close ever.

WSJ: Blue Chips Finish Strong

The Russell Investments index of 2000 small-capitalization companies, meantime, notched a record on the first day of the year, and has climbed higher since then.

WSJ: S&P Milestone Marks Investors' Embrace of Stocks