TORONTO, Aug 19 (Reuters) - Toronto Stock Exchange S&P/TSX composite index .GSPTSE :
* Falls 16.61 points, or 0.10 percent, to 16,609.45 at open.TORONTO, Aug 19 (Reuters) - Toronto Stock Exchange S&P/TSX composite index .GSPTSE :
* Unofficially closes down 48.60 points, or 0.29 percent, at 16,577.46.