Chain store sales jumped 1.9% in the week ended June 1, as Memorial Day holiday sales propelled buying, according to the ICSC-Goldman Sachs weekly survey of comparable chain-store sales, published Tuesday.

Year-over-year, retail sales improved 4.3%, the strongest it's been this year.

"The weekly sales pace has been volatile for quite some weeks battered by weather and economic uncertainty, so this week's strengthening may not last," said Michael Niemira, ICSC vice president of research and chief economist. "Overall it was a good way to end the fiscal month, however, time will tell if the overall strengthening will continue in the coming weeks."

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