Market rallies under Biden. If Trump wins it will tank as he will go after Big Tech for being monopolies. The chaos was cute round one, but adults are needed now... not to mention historically markets outperform under democrats as a little icing on the cake.
As much as this country needs Biden to win, no way it rallies on his win. Your thesis on Trump going after tech is also suspect as Trump's only bell weather is keeping the market up.
I'd say it tanks and starts recovering on a Biden win eventually. It likely rallies slightly on a Trump win and crashes spectacularly who knows when. He'd probably go after tech as you mention eventually (already going after google).

