This morning, when New York markets opened at 9:30 AM, shares of American Electric Power and Nextera Energy, two big electric utilities, briefly plunged 54% and 62% respectively.
Both companies are in the S&P 500, and the flash crash brought the utilities sub-sector of the index down nearly 8% overall.
The massive moves resulted in a trading halt in shares of both companies.
Now, AEP is only down 1.5%, and NEE is down 1.8%.
The charts below, via Nanex, show how the two stocks completely melted down over the course of only two seconds.
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