1226 GMT[Dow Jones] Credit default swaps on BP Plc are 49.55 basis points tighter as of 8a.m. EDT, trading at 543.57BP according to CMA DataVision. BP stocks also advanced to 328 pence, a 8.3% rise, after Exxon Mobil Corp. (XOM) and Royal Dutch Shell PLC were cited as possible BP buyers in a research note published Tuesday by JP Morgan Cazenove. ([email protected]) Contact us in New York. Darlene Ross, 212 416-2166; [email protected] (END) Dow Jones Newswires June 30, 2010 08:26 ET (12:26 GMT)