On the contrary, market losses usually do come back. The market is only a number. If X stock is at $50, then drops to $30, then rebounds to $50, what’s lost?
The large funds don’t dump shares and hold the money, they move it to another stock. For example, when tech is down, usually the funds are moving it to safer areas, like consumer staples etc. When apple was being dumped this morning, something else was being bought. All a cycle, the funds can’t sit on large amounts of cash, it just moves from one sector to another. On the surface, it looks like a crash, but it’s just moving money around in the end. Just so happens tech are the major holdings in the index’s because of the huge market caps and heavily weighted and when they fall, the index falls.