Traders seemed at a loss to explain the market's erratic performance.

But what causes the erratic performance of this old-fashioned pendulum?

A. Financial results since the beginning of 1999 have been very strong, but before that there were three years of erratic performance.

That erratic performance probably ended with Humana's significantly disappointing 1999 results.

Her erratic and brief performance proved hilarious for the audience, who thought that it was all part of the act.

The results were erratic performances by the quartet as a whole.

Despite an erratic legislative performance, he has earned another term.

The result has been erratic performances and a rise in the prominence of defenses.

Both were crestfallen after Stevie's erratic performance on the 17th.

Such a declaration is risky, mainly because of the economy's erratic performance in the last several years.