European stocks fell on Friday as profit warnings by retail bellwether Carrefour and mobile-phone maker Sony Ericsson rattled investors and added to worries about record oil prices.
The FTSEurofirst 300 index of top European shares unofficially closed the roller-coaster session 0.4 percent lower at 1191.88 points. On the week, the index has lost 2.5 percent.
London's FTSE 100-stock index gained nearly 12 points to close at 5529.90, while France's CAC-40 index and Germany's Xetra Dax index declined.
Shares of French supermarket Carrefour sank 7.8 percent, hitting their lowest level in more than three years after the world's second biggest retailer behind Wal-Marttoned down its 2008 operating profit forecast.
Deutsche Bank downgraded its rating on Carrefour to "hold" from "buy," citing valuation.
French rival Casino shed 8.3 percent, while Ahold fell 3.4 percent, Sainsbury lost 2 percent and Metro AG dropped 1.2 percent.
"I remain very bearish on stocks, even at current prices," said Christian Jimenez, president of IMENE Investment Partners, in Paris. "We're seeing retailers getting punished as consumers' wallets are getting hit by high oil prices. They pay more at the pump and they have less money to spend."
Mobile-phone maker Sony Ericsson warned it would make no profit in the second quarter due to weaker demand for its more expensive phones, sending shares in co-owner Ericsson down 7.6 percent.
Finnish rival Nokia dropped 4.5 percent after Credit Suisse downgraded its rating on the handset maker to "neutral."