Root cause of current asset buble

It all started in 2000 when Federal Reserve chairman Alan Greenspan; faced four challenges that caused near deflation. The customer CPI in 2001 was 1.5%, the lowest since 1986. The CPI rosed to 2.83% in 2002 but dipped again to 1.88% in 2003. In response, the annualized effective Fed fund rate declined from 6% in Jan 2001 to 1.8%.