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Re:Coinbase stock lost over 75% value by londons_explore on Tuesday May 10, 2022 @05:57AM (#31325261)
The counterparty for the bid price, and the counterparty for the ask price are commonly the same person.

So when you execute both trades, you are putting a literal $20 into their pocket.

Re:Coinbase stock lost over 75% value by dchftcs on Tuesday May 10, 2022 @09:13AM (#31326702)
Then just don't execute both trades... and everyone can quote on the current bid or the ask price, you should do it too if you're afraid of crossing the spread.
Re:Coinbase stock lost over 75% value by shahmeern on Tuesday May 10, 2022 @10:58AM (#31327900)
That's fair but calling it a fee is disingenuous, especially considering your contrived scenario of buying and then immediately selling