Chart 3: Time with a two-sided quote at & within 1% of NBBO across all NMS stocks. Those with an eye for detail might see that this data is from 2020. Not much has changed.

Other venues join NBBO at different rates and speeds. What does tend to happen more consistently is that other venues join (or copy) the NBBO prices that have been set on the primary.

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Webull tweeted that it wouldn't allow people to buy GameStop (GME), AMC (AMC) or Koss Corporation (KOSS) stock on Thursday. It cited the increased market volatility as the reason.

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Chart 3: Time with a two-sided quote at & within 1% of NBBO across all NMS stocks. Those with an eye for detail might see that this data is from 2020. Not much has changed. However, more current data ...

Compare TradeStation and Webull, two popular online trading platforms, to discover their key differences, features, fees, and which one suits your investment needs best.

Webull could be a good fit for a variety of investors, from beginners to options traders seeking fee-free trading. Read U.S. News' expert review before you decide to invest with Webull or another ...