All these media people who write about markets need to adjust their perspectives on what a sell-off means. A 2% reduction for a market cap of 80 trillion dollars still leaves about 78 trillion dollars in the market. The way the market behaves when there's 78 trillion dollars would be very different from how it would if there were 20 trillion dollars. With volumes of these kind, the instrument becomes a currency in itself causing a sort of runaway effect that will keep it going. When everyone's money is in the market, would the market ever fall?

> When everyone's money is in the market, would the market ever fall?

Price discovery is at the margins: it's determined by (active) buyers and sellers.

If you're a (passive-ish) buy-and-hold kind of person you're generally not involved in the process (except on your (bi-)monthly purchase off your paycheque in for your retirement account).

So the active folks can cause prices to go down.

> When everyone's money is in the market, would the market ever fall?

Yes? We had an entire great depression that tanked the global economy for a decade, and smaller dips since.

I regret to inform that the line does not, in fact, always go up. It does go down sometimes regardless of how much money is put into it.

>All these media people who write about markets need to adjust their perspectives on what a sell-off means...

err... they already know. It's click bait stories to get readership.

The money isn’t in the market, when you buy shares the money goes to the seller.