Yesterday the 10 year  TIPS closed at an all time low of -0.33%.   The flight to safety due to the Greek crisis pushes TIPS down  because 10 year exceptions of inflation are not really being affected by Greece.  ( TIPS + inflation expectation = Nominal treasury yield ).  Fixed income investors are going to have to tolerate an “extended period” of low returns.   If you want to see this data in a nice convenient form look under the fixed income > historic yields tab and select TIPS.