Earnings disappointment dent European shares, Athens retreats further
* FTSEurofirst falls back 0.5 pct, Euro STOXX down 0.8 pct
* Athens market down 2.2 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 (Adds detail)
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, and energy stocks hit by weak oil prices.
The pan-European FTSEurofirst 300 index was down 0.5 percent at 1,576.27 at 1230 GMT, while the euro zone's blue-chip Euro STOXX 50 index was down 0.8 percent.
Athens' stock market, which slumped 16 percent on Monday after a five-week shutdown, fell a further 2.2 percent. Greece has had to introduce capital controls and is seeking a new bailout deal following a debt crisis. Continuación...