Very much so. That’s basically what I posted above. When Tesla split, some of the discussions were comical. There were plenty of people who legitimately thought they were getting free shares. They may have notice the price go down but then the price jumped so much that it was like free money or just way overpriced. Same thing with some of the hot stocks going up when they acquire a company. Normally you go down as you are diluting the shares since you have to pay a premium over the other company’s current share price. So many other examples. That’s why tweets and other news, including upgrades are moving stocks way more than normal.
I don’t think it’s systemic, but certain stocks have gone up way too much and are worth way too much on news rather than tangible results because ain’t nobody got time for that. Long term stock ownership is so 2019.