You've heard the term "Fed repo rate." Do you know what it is or why it's important to have some background on? Market commentator Wolf Richter hunkers down to explain it clearly and easily and put all the pieces together as to what the Fed is doing in markets. Great read: $STUDY via @wolfofwolfst on Twitter End Of QE-4: Fed's Repos Drop Below October 2 Level, T-Bills Balloon, MBS Fall, Total Assets Down To December 25 Level