When it comes to diving trends in the Fed's take over of the Treasury market, there are those who haven't got the faintest clue about what is going on, such as Paul Krugman, who naively looks (as Bernanke expects all economists to) at the simple total notional of securities held by the Fed and concludes that the Fed is not doing anything to adjust fixed income risk-preference, and then there are those who grasp that when it comes to defining risk exposure in the bond market, and therefore in equities, all that matters is duration, expressed in terms of ten-year equivalents. Sadly, this is a data set that not every CTRL-V major or Nobel prize winner (in order of insight) can grab from the St. Louis Fed - it is however available to those who know where to look. And as the chart below shows, even as the Fed's balance sheet has remained flat in notional terms, its Ten Year equivalent exposure has soared, rising by 50% during Operation Twist alone, from $900 billion to $1.313 trillion. What this means in practical terms, as Stone McCarthy summarizes, is that the Fed now owns 27.05% of the entire inventory in outstanding ten-year equivalents. This leaves less than 75% of the market in private hands.