For some banks, the combined issuance of asset-backed securities and commercial paper (short-dated securities) amounted to about half of all their loans.
Operation Twist is a program where the Federal Reserve sells shorter-dated securities and buys longer-dated ones in a bid to push down longer-term yields.
By buying longer-dated securities, in this case, 6 to 30 years out, and selling maturities of 3 years and younger, it would squash the yield for farther-out Treasurys and lift the yield for the nearer Treasurys.