I guess it's traders gambling, "We're not sure if it's true, but if it's true, then we need to be ahead of the rest of the market!". Interestingly, if I were a

I guess it's traders gambling, "We're not sure if it's true, but if it's true, then we need to be ahead of the rest of the market!". Interestingly, if I were a trader and I knew the Eli Lily tweet was fake, would I ask "What are the chances a many people are going to fall for this, and how will they react, and can I make a profit out of their stupidity?"