A few reasons:

1. Market prices are more often determined by speculation than actual intrinsic value. People will say that the market is “efficient” in the sense that everything is valued efficiently based on the value it’s worth, but take one look at meme stocks and you’ll see that prices can easily be influenced by large volumes of purchases instead of any actual intrinsic value in the corporation being invested in. A lot of money being funneled into index funds can lead to the price of stocks continually increasing without actual value of the underlying companies being taken into account as much as you would think.

2. Fascism is supported by, and continues to support capitalism. Corporations benefit from capitalism, especially under a system where safeguards are removed and businesses can make larger profit margins as a result.

3. A lot of the changes Trump is making hurt working people, but don’t hurt corporations. (and often even help corporations directly) For instance, he’s making union busting easier, knows that any tariffs can simply be passed on by the companies without shrinking their margins, (just costing you more), is cracking down on legal immigration to the point that illegal migrant workers are even easier to exploit with the threat of deportation, etc. A lot of the bad things Trump is doing will only affect us, not corporations or the capital owning class.