TORONTO, Aug 11 (Reuters) - Toronto Stock Exchange S&P/TSX composite index .GSPTSE :
* Falls 26.35 points, or 0.16 percent, to 16,579.15 at open.TORONTO, Aug 11 (Reuters) - Toronto Stock Exchange S&P/TSX composite index .GSPTSE :
* Unofficially closes down 116.61 points, or 0.70 percent, at 16,488.89.