BUZZ-Silver Wheaton Corp: Bought deal financing
** U.S.-listed shares of company, which invests in miners in exchange for silver and gold, down 3 pct at $17.07 premarket
** Prices $500 mln bought deal financing at $16.60/share aftermarket on Wednesday, a 6 pct discount to stock's close
** Underwriters led by RBC Capital Markets, BMO Capital Markets, CIBC Capital Markets and Scotiabank agree to buy 30 mln shares
** To use proceeds to repay portion of debt drawn on its $2 bln credit facility in November
** Grants underwriters right to buy additional 4.518 mln shares at same price, which, if exercised, will raise gross proceeds to about $575 mln
** Up to Wednesday's close, stock had risen 42 pct this year
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