Two weeks ago, when we commented on the biggest farce in financial thinking at the time (promptly replaced by the even more lunatic platinum coin "idea"), namely that one of the main "spending cut" proposals of the Obama administration, one amounting to $290 billion, was the assertion that the US will save hundreds of billions because, get this, interest rates are now lower than they were before. We commented as follows: "this is where one's Excel refs out, because the interest payment on Treasurys, at least in a non-banana republic, one set to see 120 debt/GDP in 3-4 years, is a function of fiscal decisions (central-planning notwithstanding), and to make the idiotic assumption that one can control interest rates for 10 years (central-planning notwithstanding), just shows what a total farce this whole exercise has become, and also shows that nobody in the administration, or the GOP for that matter, has even modeled out the resultant budget pro forma for the proposed tax hikes and budget "savings" as that would blow up said excel model immediately." We now learn that one other entity that did not fully model out the last minute Fiscal Cliff deus ex, and especially not the recursive debt relationship in a country where half the government spending is funded by debt, is the always amusing CBO (whose epic prediction failure rate has been discussed here on numerous occasions). It appears that they just did, after the close, on Friday. The outcome? Their initial estimate of a $4.0 trillion budget increase was wrong and when one factors in the fact that this incremental spending would have to be funded by, you guessed it, debt, debt which has interest, the full impact of the Obama tax cut rises deficits by 15% to $4.6 trillion over the next decade.