Quote from Dogfish:
This week's commitment of traders report might be of interest to you...
"The CFTC report suggests .... Commercial traders added 28,112 to their net long position, ending the week with a net 290,276 long position. ....."
The analysis quoted is misleading. Commercials reduced their exposure in the 10 year for both longs and shorts:<pre>
Long Short Net
May 3: 1,333,135 1,070,971 262,164
May 10: 1,327,889 1,037,613 290,276
Change: -5,246 -33,358 28,112 </pre>
So yes, the net long position is now larger, but it seems like it was more of covering shorts rather than establishing new longs.
The open interest in the 30 year has also been falling on this rally the past few weeks. That's not a sign of 'buying the rally' but instead indicative of covering positions.