I was watching GME stock on Feb 24, 2021, and it halted twice:
- once at 3:38pm ET, and it resumed trading at 3:43pm ET
- again at 3:46pm ET, and it did not resume trading until after 4:00pm ET
This is consistent with the Nasdaq's list of stock halts:
Both GME halts were classified as volatility halts. I've seen stock volatility halts before, and I thought they were always 5 minutes long. The first GME volatility halt lasted 5 minutes, but the second volatility halt lasted 14 minutes.
Then on Feb 25, 2021, GME had 4 volatility halts in the morning, each of which lasted 5 minutes.
What determines how long a stock volatility halt will last?
Also, what exactly is the trigger for a stock's trading to be halted due to volatility?