Spot the pattern

Jul 5th 2011, 18:55 by R.A. | WASHINGTON

HERE'S a chart showing the yields on 10-year Greek debt over the past three months. See the pattern?

There's a spike, followed by a decline, followed by a higher spike, followed by a decline to a higher trough, and so on. European leaders keep taking steps to avert disaster, and each time markets are less assuaged.

The latest spike corresponds to the stalemate over the IMF's willingness to continue making bail-out payments without a new, long-term rescue package in place (and the corresponding disagreement over how to rollover Greek debt, plus the drama surrounding the passage of Greece's new austerity plan). The IMF agreed to keep paying, French and German banks seemed willing to sign on to a rollover plan, and Greece got its new austerity programme through parliament. But it wasn't long before trouble kicked up again.

Moody's and Standard and Poor's have both suggested that the agreed-upon rollover plan might well constitute a default. Since that's precisely the outcome European leaders were hoping to avoid, this news has sent everyone scurrying to come up with a new and better deal. Meanwhile, Moody's has cut Portugal's debt rating to junk. Portugal may well need a new rescue package, which will surely include debate over the fate of creditors, which will mean more questions about bank finances and more brinksmanship. And the European economy continues to slow, even as the European Central Bank continues to tighten policy.

I don't know that there's any broad lesson here, other than: for all the steps already taken by European leaders, the euro zone hasn't really gotten any closer to solving the underlying issues of insolvency and institutional weakness.