You obviously don't understand the concept of duration. You are comparing 5-10yr debt to 20-30yr debt.
More apt comparison would be intermediate treasuries, much different picture (time frame also questionable for a pure comparison):
More apt comparison would be intermediate treasuries, much different picture (time frame also questionable for a pure comparison):
http://etfdb.com/etf/JNK/fundamentals/ http://etfdb.com/etf/IEF/fundamentals/