EFF might drop even more if UST unwinds the SFP and floods banks with $200b more excess reserves
"Possible Market Disruptions Lie Ahead
Adoption of the tax bill will likely lead to a slightly earlier-than-anticipated need to hike the debt ceiling. This appears to be setting up as a real political donnybrook that could trigger significant market disruptions. Any disruptions to auctions and associated cuts in Treasury supply could promote temporary declines in Treasury yields. At present, the Treasury is about $500 billion below the current $14.3 trillion debt ceiling and, assuming the pending tax deal is enacted, we estimate that the limit will be hit in March. However, at that point the Treasury can unwind the Supplementary Financing Program (SFP) and use other accounting mechanisms that have been employed in the past in order to continue to operate normally until May or June. At that point, the Treasury will likely run out of options, and the threat of cancelled auctions, a federal government shutdown, and missed coupon payments will begin to loom large. In fact, a replay of the 1995-96 stand-off on the debt ceiling now seems like a high probability." - MS Greenlaw