Only 2 times recently the exchanges tried to put a stop to the Madness. Once in December they shorted the Cancer stocks after they popped.
Then because of the 1000's % gains on $GLSI, $OCG etc. they had to cool things out and take them down.
But these Chinese pumps? Nothing
I don’t understand why they put a stop to people making money. Stocks are literally gambling. That’s how gambling works. Sometimes you win. Sometimes you lose. Why penalize people for winning big?