This is nonsense, overall healthcare (including Eli Lilly) stock selloffs started before the tweet.
Most of the time it is either extremely exaggerated or outright false.
The "taking heads" always want to find some sort of causation/correlation and often it is just absolute garbage.
One day they may make a statement like : "Stocks tumble on Ukraine updates"
The very next day : "Stocks rally on Ukraine updates".
They just look for any "news" to try to show they understand the interconnected nature of news and markets. Often they are just grasping at straws.
Here's the thing.. If they could actually do what they say they are doing, hedge funds would be snapping them up and paying them far more.
When CPI went sky high few months back and the stock market still rallied the news was "S&P rallies while investors digest CPI information".
Like, what is this even supposed to mean?