For the year 2009–10, for example, the Advance Estimate of GDP growth rate at market prices from the expenditure side, that came out in February 2010, was 6.8 per cent. That was changed to 7.7 per cent in the Revised Estimate in May 2010 and further to 9.1 per cent in the Quick Estimate in February 2011.
The proximate reason for this change was regulatory concern over the decline in capital ratios of the largest banks – a concern reinforced by Congress, as it saw some of those large banks facing enormous losses on their loans to foreign sovereigns. Within a few years this U.S. regulatory innovation was effectively internationalized by the original Basel Accord.