Tim Culpan, Columnist

The Kids Are Alright

The power of WeChat will overcome any gaming setbacks.
Zhang Peng/LightRocket via Getty Images
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The biggest drop in 17 months on volume almost double the 20-day moving average.

Investors are in a tizz about the prospects for Tencent Holdings Ltd. after two scathing state-media attacks and the company's own decision to rein in underage gaming. That served as an excuse to profit from the stock's big rise this year.