Regular readers of Zero Hedge know that in recent months tracking the portfolio and thoughts of one Bill Gross via the holdings of his flagship Total Return Fund (which just jumped by $6 billion in the past month and is just shy of its all time record north of $250 billion) has meant one thing and one thing only: betting on the Fed monetizing Mortgage Backed Securities or bust. Well, in January he just took it to a whole new level. The fund has now borrowed a record $88 billion, or -35% of its AUM, in cash (shows how much he thinks of the dollar) and used the proceeds (together with dumping European sovereign bonds from 18% to 11% of AUM) to bet on MBS which now stood at a whopping 50% of the entire portfolio - the highest since July 2009 when QE1 was in full force. However, in absolute dollar terms, due to the growth of the fund's AUM, the actual bet on MBS has never been bigger, and at $125 billion, represents the biggest notional bet ever made by PIMCO. Treasury holdings of just over $100 billion with an effective duration of 6.33 complete the epic bet that the fund has now put on QE3.