Sorry, it looks like it was talked about too much on social media, causing the price to go up. The people in charge want it to go down, so it's blocked. Thanks for choosing Robinhood!

AAL is definitely the fishiest of the bunch, it's not even close to back to precovid levels, and it's a reasonable buy for anyone who expects travel to return to normal at some point.

It reads like they got a list of positions to halt buying on from their investers.