most ordinary folks investments are in retirement and older generations have been able to fund their retirement better than newer ones. older generations have to sell (or die and its sold usually because the kids need like a house or such). Rich folks never really have to sell, even if they are not working they get more than enough in dividends even if they are not paying a lot atm due to their massive stock amounts to begin with. Further they are more likely to buy more stock with dividends than regular folks.