Norm Conley, chief executive officer of JAG Capital Management, last week said the whole GameStop ride had been the wildest thing he’d seen in markets in nearly three decades.

Now he says: “You never know how long these sorts of things will last but you can be pretty sure it’s not sustainable for the long term,” Also: “Trading propositions or trading action in securities or commodities could be often crazy to some degree in the short term, but investing propositions usually do not look that crazy.”

Dead Right About GameStop Four Pros Recount a Week of Reckoning – Bloomberg