FTSE 100 heads for one-year low after tumultuous week By: MarketWatch October 10, 2014 at 03:43 AM EDT Most U.K. stocks are mired in the red on Friday, setting the FTSE 100 index on track for a third straight week of losses. Read More >> Related Stocks: BAT Bhp Billiton Ltd ADR Rio Tinto Plc ADR