Consumer prices in France remained unchanged in May after falling for three consecutive months. The CPI was revised from previously estimations of -0.10% in May, data from Insee showed. On a monthly basis, French consumer prices gained 0.40% as expected, and extended the gains from April's 0.10% increase. Prices gained as food prices increased on account of a rise in petroleum prices, for the third month straight. Another measure of inflation, the harmonized index of consumer prices or HICP was up 0.50%.