Earnings disappointment dent European shares, Athens retreats further
* FTSEurofirst falls back 0.3 pct, Euro STOXX down 0.5 pct
* Athens market down 1.3 pct after Monday's 16 pct fall
* Worries over stalled reforms hit Credit Agricole shares
* BMW down as earnings momentum slows
* Continental AG rises after hiking outlook
By Sudip Kar-Gupta
LONDON, Aug 4 (Reuters) - European stock markets lost ground on Tuesday, with French bank Credit Agricole and German carmaker BMW among the worst performers after reporting results, while weak oil prices also weighed on energy stocks.
The pan-European FTSEurofirst 300 index, which rose 0.7 percent on Monday, fell back 0.3 percent while the euro zone's blue-chip Euro STOXX 50 index also weakened by 0.5 percent.
Athens' stock market, which slumped 16 percent on Monday on re-opening after a five-week shutdown, fell a further 1.3 percent. Greece has been hit by debt and economic problems, and is seeking a new bailout deal. Continuación...