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Re:Why Index Funds Are Like Subprime CDOs by badfrog on Wednesday September 04, 2019 @11:31PM (#20883635)
The rules are covered here: https://www.sec.gov/oiea/investor-alerts-bulletins/investor-...

LULD is the one that applies to single stocks. It only results in a five minute halt, as I said.

The market-wide circuit breaker can halt the entire market for a full day, but only in response to a 20% move in S&P500, not a single stock.

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