This week, “credit” appeared only in sentences including this clause: “The worst is over.” The worst probably is over for write-downs of the abysmal “structured securities” of the 2001-2007 era. However, euphoria at that prospect masks these things: the financial system is still too busted to function properly; credit is extremely scarce and expensive; the system is terribly vulnerable to recession-cycle credit loss ahead; and inflation here, there and everywhere is forcing global economic slowdown.

The loopy reply from the stock market: Business is great! Earnings are down but are headed up! Global trade will fix everything!

Retail sales were 0.1 percent positive because of higher gasoline prices (ick), and industrial production upticked a 0.3 percent hair, capacity in use hanging at 80 percent stall-speed. New claims for unemployment insurance are also at an edge, about 375,000 weekly; extended claims rising near 3 million signal recession. CPI was OK: overall 0.3 percent, core 0.2 percent.

The Street’s party rests on good results at IBM, Google and Caterpillar, and coulda-been-worse financials: Merrill wrote down only $6.6 billion, Citi only $16 billion. Only.

Give the financials this: Despite the huge write-downs consuming most of the new capital raised by the two firms, their losses net of write-down were $1.96 billion and $5.11 billion, respectively, which means their current operations are making good money. In time they will re-capitalize themselves. In time for the economy?

The commentariat this week, even informed non-spinners, has announced “relaxing” of the Crunch, “normalization” beginning. They are partly correct, but not the part that matters to the economy. The Bear Stearns lesson is sinking in: No large institution will be allowed to fail, here or in Europe, or anywhere. Central banks will not allow it. So, big money fearful of that event has stopped its panicked buying of Treasurys (even gold), begun to unload, and up rates have gone.

Nevermind that they were worried about the wrong thing. The Crunch is still full-on: The spread between retail mortgages and the 10-year Treasury is still 2.5 percent, at least 0.8 percent out of line. Fixed-rates in the mid-sixes intercept housing recovery, eliminate the benefit of payment-reducing refis to crimped household budgets, and makes ARM-escape impossible. The jumbo loan market is still completely broken, and the new mini-jumbos are a high-priced joke. Issuance of securitized credit of all kinds is at standstill.

In the broad credit markets, Libor is the global mark for all short-term borrowing. The Wall Street Journal this week discovered the Libor-setting British Bankers’ Association had for months conspired to understate the wildly high true cost: Three-month dollar Libor is 2.91 percent today (really) versus 90-day T-bills at 1.43 percent, five times a normal 0.3 percent spread.

The Treasury/Libor spread (called the “TED” spread for ancient reasons, Treasury/Eurodollar) has always been considered a default-risk measure: ultra-safe Treasurys versus unsecured bank-to-bank loans. We know now that no one need fear a major institutional failure, and so the heart of the Crunch is coming clear: Libor is high-cost because loans are scarce. Same for mortgages. Pure supply/demand.