"In announcing that it will boost purchases of government bonds to a record annual pace of $709 billion, the central bank has just added further fuel to the most obvious bond bubble in modern history -- and helped create a fresh one on stocks. Once the laws of finance, and gravity, reassert themselves, Japan's debt market could crash in ways that make the 2008 collapse of Lehman Brothers look like a warm-up. Worse, because Japan's interest-rate environment is so warped, investors won't have the usual warning signs of market distress. Even before Friday's bond-buying move, Japan had lost its last honest tool of price discovery. When a nation that needs 16 digits in yen terms to express its national debt (it reached 1,000,000,000,000,000 yen in August 2013) sees benchmark yields falling, you've entered the financial Twilight Zone. Good luck fairly pricing corporate, asset-backed or mortgage-backed securities."