Doesn't anyone here know how to handle a bailout?

In a season of mind-boggling events, this seems particularly boggling.

It’s a $138 billion mystery.

In the early hours of Sept. 15, after the government refused to rescue the foundering Lehman Brothers, something odd happened. The Federal Reserve lent tens of billions of dollars to a subsidiary of the newly bankrupt bank.

In other words, government officials who had refused to risk taxpayers’ money on Lehman before it collapsed did just that after it collapsed.

On Monday the Fed lent the Lehman unit $87 billion through JPMorgan Chase. After being repaid on Tuesday, it lent another $51 billion — putting the bailout, arguably, in the same league as the initial $85 billion bailout for the American International Group.

This mystery loan is just one piece of the larger Lehman puzzle. Who lost Lehman? Why, and how? Three months later, those questions still nag.

Transparency. Trust. Remember those?