If I may ...
Hey semi, ahhh, capitalism died a long long looooong time ago. Today we have corporatism along with modern monetary theory operating within a debt based currency system along with extreme high speed computer algorithm trading sponsored by the private international banking cartels and high level financial institutions. Economic financial fundamentals went out the window along with capitalism a long long looooong time ago. Don't you get it yet? They, (the evil maniacal degenerate private and international monied class), are playing a game, amongst themselves, using, wait for it, us. That 401K, ROTH, IRA, etc., play money for their casino. Stocks? They play games to see who can run up, or run down, a sector, any sector. They profit when it goes up. They profit when it downs down. They profit when is goes sideways. They profit from any and every kind of move. Because they control it.
By the way ...... your "decade of robust growth" is nothing but the representation of INFLATION which is the ever expansion of the money supply over those years being reflected in those stock prices. Idiot.