TORONTO, Aug 13 (Reuters) - Toronto Stock Exchange S&P/TSX composite index .GSPTSE :
* Falls 21.29 points, or 0.13 percent, to 16,553.99 at open.TORONTO, Aug 13 (Reuters) - Toronto Stock Exchange S&P/TSX composite index .GSPTSE :
* Unofficially closes down 57.04 points, or 0.34 percent, at 16,518.24.