0918 GMT [Dow Jones] BP's provision of $32.2B for costs related to the Gulf of Mexico oil spill are based on optimistic assumptions and there are risks it might have to make further provisions in following quarters as the various investigations on the causes of the accident progress, warns Credit Suisse. However CS sees good long-term value in BP's shares and thinks it is possible to build an upside-case scenario. Nevertheless "after the strong rebound of the last few weeks, we believe clarity on liabilities and more confidence in BP's post-Macondo strategy is needed for the shares to continue to outperform." Outperform rating, 515p target. Shares +0.3% at 418p.(andrea.tryphonides@dowjones.com) Contact us in London. +44-20-7842-9464 Markettalk.eu@dowjones.com (END) Dow Jones Newswires July 27, 2010 05:18 ET (09:18 GMT)