One catalyst for this week's sell-off was a worse-than-expected reading for the Caixin, a purchasing manager index that is a closely watched indicator of manufacturing activity.

最近抛售的导火索之一是备受关注的财新中国采购经理人指数比预期更糟糕。

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The Dow was up 80 points before pulling back after the Institute for Supply Management's purchasing manager index fell last month.

WSJ: Blue Chips Hold, End Higher

Non-manufacturing purchasing manager index for March rose 1.1 percentage points to 55.6.

FORBES: Market Still Ignores China's Relatively Positive Economy

The Purchasing Manager's Index (PMI) was at 50.9 in March, up from 50.1 in February, official data showed.

BBC: China manufacturing activity at 11-month high in March