Bank of Japan

To get a glimpse of what's in store, take a look of Japan.  The land of a stagnated economy since 1990s to spurring the greatest points jump in history. How, Japan's love affair with ETFs on the Tokyo Exchange.  Yesterday BOJ bought nearly a $1B worth of ETFs.  Don't pay attention to the fact that BOJ already owns over 80% of Japan's ETFs.  How can an argument be made that there is a functioning market when a central bank like BOJ owns the market?