Currently examining the chart only Portugal, and Australia are offering better yields than the US 10 year. Clearly risk is being artificially repriced according to central bank machinations. Keep in mind Eurozone member bonds were priced for default within the last 24 months. Now government bonds in Spain and Italy are priced as if they represent better credit risk than the US! That's pure foolishness.
As a fixed income portfolio manager you can't find a better setup. As a result it is my belief that the previous sell-off in global bond markets represented more rotational and risk management behavior as opposed to a new trend. Again, put yourself in a fixed income PM's shoes. You have a multi-billion dollar bond portfolio to manage, your options are limited in terms of investable markets. The best credit risk in the world (USD) is yielding higher than 80% of your available options. On a relative basis you better believe there will be a bid under treasuries as long as the current capital market framework is in place.
Examining the % change in yields of US treasuries from their Wednesday highs to Friday's close, it appears as if portfolio managers were moving to the shorter end of the curve as the 2, 5, 10 year all outperformed the 30 year.