People after the financial crisis liked to talk about fat tails. Risk models assuming narrow tails, reality having a taste for extreme events. This is a fat-tail event. We don't have great models for stocks as volatile and as correlated as GME is right now. Which means for even cash equities trading, we don't have a great sense around what the appropriate spread should be.
Market making has sometimes been described as vacuuming up nickels in front of bulldozers. These are bulldozin' times. You don't want to fill a bunch of sell orders in GME right before it gaps down 80%.
On exchanges. Those are buyers and sellers as well as market makers. Robinhood connects to a subset of the latter.
Nope, pretty much just market makers.
Normally internalizers have no problem competing with spreads on the exchanges, because retail flow is much less toxic than the sophisticated traders in the public venues. But with GME, the retail investors are running the show.
Therefore it no longer makes sense for internalizers to pay for this order flow.
If this is coming from Robin Hood, they could make the (very weak) argument that they are protecting their retail customers from themselves, but if it's coming from Citadel, it just looks like market manipulation to me.
Given that it's not just RH, but nearly all, if not all, brokers that outsource order flow like RH...I think it's safe to assume it wasn't RH decision.
This is a much bigger deal, some (not hedge fund!) people are going to lose a crapton of money on it, and people are probably going to sue them once that happens.
You can see this discussed elsewhere in the thread.
For trying to get some positive media coverage, after being constantly bashed and blamed by them for the uneducated retail trader boom.