shares of occidental petroleum corp oxy sank 068 to 5856 tuesday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 030 to 397015 and dow jones industrial average djia falling 071 to 3265670 this was the stocks third consecutive day of losses occidental petroleum corp closed 1857 short of its 52week high 7713 which the company reached on august 29th despite its losses the stock outperformed some of its competitors tuesday as chevron