The largest revision took place in 1997 when the book increased in size from 480 to 600 pages.

GDP was subject to large revisions, making policy difficult to communicate.

But the report noted that relatively large revisions might turn out to be necessary at other companies as well.

Nexopia launched an update to its user profile pages, the largest revision since the site's launch in 2003.

But dealers said the large revisions in the October data made this figure also suspect.

The number that led to all the selling was a very large upward revision in March retail sales.

Such a large upward revision, though not viewed as likely, would force economists to rejigger their calculations about the current pace of the expansion.

The market is now looking at tomorrow's employment number as a jump ball, he said, forecasting "a large revision to April's number."

It was the second time the company did such a large revision to its oil spill statistics.

The biggest reason for the slower growth announced Wednesday were large revisions to consumer spending.