US Treasury Yield Curve Pre & Post QE3

Lets take a quick look at Treasury Yields.  Since QE3 is primarily intended to purchase bonds to reduce interest rates, lets take a quick look at the treasury curve the week before, during, and after QE3.

As you can see...there really wasn't much of a change (at least vs Sept 4). While yield has increased (and interest rate decreased), it was only from 1.12% on Sept 13 to 1.18% on Sept 19.  Relatively insignificant as interest rates are already close to the lower bound...