BUZZ-Rough day for healthcare sector, biggest drag on market
** S&P healthcare stocks down 1.7 pct in Tuesday afternoon trading, sector biggest weight on S&P 500 index , which is off 0.2 pct
** Healthcare stocks are the 10 top drags on benchmark S&P 500; Allergan, Pfizer, AbbVie weigh the most. Chart: tmsnrt.rs/22i0Nio
** Pharmaceuticals, biotechnology, healthcare equipment and healthcare distributors are four biggest sub-industry weights on S&P
** Specialty pharmaceutical cos Endo International, Mallinckrodt are worst percentage performers in S&P, down 20 pct and 15 pct, respectively
** Shares of specialty drugmakers hit as beleaguered Valeant Pharmaceuticals slashes outlook, says delay in filing annual report puts it in danger of a default
** YTD, healthcare is worst-performing sector, down 7 pct vs 1.4 pct decline for the S&P 500
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