FTSE 100 set for worst week of 2015 By: MarketWatch June 05, 2015 at 04:41 AM EDT U.K. stocks head for their biggest weekly loss of the year so far, on concerns over outcome of an OPEC meeting as well as jitters over Greece’s debt talks. Read More >> Related Stocks: BP Plc ADR Tesco Plc ADR Vodafone Grp Plc ADR