WASHINGTON (AP) — The nation’s economy grew at an annual rate of 1 percent this spring, slower than previously estimated, the Commerce Department said Friday. The downward revision is stoking fears that the economy is at risk of another recession.

Fewer exports and weaker growth in business stockpiles led the government to lower its growth estimate for the April-June quarter from the initial 1.3 percent rate.

The economy expanded only 0.7 percent in the first six months of the year, the agency said.

Nine of the last 11 recessions since World War II have been preceded by a period of growth of 1 percent or less, economists note.

“The economy is teetering on the edge of a renewed recession,” said James Marple, an economist at TD Securities. “Any renewed shock could push the economy over the edge.”