BUZZ-Valeant shares slide ahead of long-awaited earnings report
** U.S.-listed shares of Valeant Pharmaceuticals down 3.6 pct in Monday morning trading, ahead of expected Q4 earnings report on Tuesday
** Valeant shares worst daily perfomer in NYSE Arca Pharmaceutical index, which is off 0.7 pct
** Drugmaker is under pressure to introduce more transparency into operations, expand management ranks to regain credibility in the investment community, Reuters reported on Friday
** Shares have lost about three quarters of value from 52-week high of $263.81 reached in August, as it faced growing scrutiny over drug pricing and its connection to a specialty pharmacy
** YTD, Valeant shares are off 34 pct vs 6.5 pct decline for NYSE Arca pharma index
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