News/Reuters/BRIEF-Toronto Stock Exchange unofficially closes downBRIEF-Toronto Stock Exchange unofficially closes downDec 5, 202221:00 UTCTSXTORONTO, Dec 5 (Reuters) - Toronto Stock Exchange S&P/TSX composite index TSX:* Unofficially closes down 243.40 points, or 1.19 percent, at 20,242.26.