The reversals of market wisdom: and vice versa.

• Author: Sullum, Jacob
• Position: Column

REMEMBER WHEN Treasury Secretary Henry Paulson warned us, back in September, that the economy was about to collapse unless Congress immediately authorized him to spend $700 billion on "troubled assets" held by banks? Remember when he said banks would never lend again as long as they remained saddled with these bad investments?

You do remember? So it's not just me. I was beginning to think I had dreamed the whole thing. In November, Paulson said the Treasury Department would not be buying any troubled assets after all. Instead it would use the $700 billion to buy the banks themselves, which I could almost swear Paulson had said was a bad idea a couple of months before. Presumably the Bush administration continued calling the effort the Troubled Asset Relief Program for the sake of the acronym, which suggests a cover for something unsightly or embarrassing.

The TARP turnaround is not the only bewildering reversal of economic wisdom we've seen in recent months. Here are some of the more memorable:

Loose credit is bad, and so is tight credit. Loose credit encouraged people to buy houses they couldn't afford, which raised defaults and foreclosures, which undermined the value of mortgage-related assets, which made financial institutions that held such assets cut back on lending. The solution, according to the Bush administration: looser credit.

Moral hazard is bad, except when it's necessary. Government guarantees, such as the implicit commitment to bail out the congressionally created mortgage companies Fannie Mac and Freddie Mac, encouraged lenders and investors to take bigger risks than they otherwise would have, contributing to the collapse of confidence in financial institutions and the credit crunch. In response, the Bush administration offered more bailouts--of banks, insurers, and homeowners--and raised the limit on deposit insurance by 150 percent. President Obama wants to bail out carmakers too.

Rising prices are bad, and so are falling prices. As recently as mid-August, we were worried about runaway inflation. In an article headlined "Higher Costs Are Taking a Toll on Business," The New York Times reported that "rising prices have seeped into much of...