Quote from Maverick74:
All of our economic growth is coming from inflation. The more inflation we have, the lower our dollar. Japan has had zero economic growth for decades and their currency reflects that. The more money we print, the lower our currency goes. Since stocks have a fixed amount of shares and the supply of dollars that's chasing stocks is increasing, it forces stocks higher. Keep in mind stocks are a spread trade like everything else. It's all relative value. AAPL is priced in dollars. If we price stocks in Gold, equities are sitting near the 2009 lows.
Let me put it another way, if you continue to lower the denominator in the equation, the relative value of the numerator goes higher. So when you see a SPY quote, what you are really seeing is a currency trade SPY/USD.