CNBC's Pippa Stevens brings you the day's top business news headlines. On today's show, CNBC's Yun Li reports on how the SEC's scrutiny of meme stocks is getting serious. Plus, Federal Reserve officials step down amid controversy over stock purchases.

00:00 - CNBC After Hours, Sept. 28, 2021
0:13 - Stocks fall sharply amid tech sell-off
0:47 - Numbers to know
2:02 - SEC looks to get serious on meme stocks
4:06 - Fed presidents step down over stock controversies

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