(BLOOMBERG) Household purchases and business spending on equipment slowed in the third quarter, even as a buildup in inventories unexpectedly boosted the pace of economic growth in the U.S.

The 2.8 percent annualized gain in gross domestic product followed a 2.5 percent increase in the prior three months, Commerce Department figures showed today in Washington. Final sales, which exclude unsold goods, rose 2 percent in the third quarter as consumer spending climbed at the slowest pace since 2011 and corporate investment fell.

The biggest gain in inventories since the beginning of 2012 risks holding back the economy this quarter as companies limit production. A 16-day partial shutdown of the federal government added to the headwinds that the Federal Reserve is trying to offset by maintaining $85 billion in monthly bond purchases intended to keep borrowing costs low.

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