Jan 20 (Reuters) - Canada's main stock index opened higher on Thursday, tracking Wall Street and as domestic healthcare stocks rose, although a fall in energy companies capped gains.

At 9:31 a.m. ET (1431 GMT), the Toronto Stock Exchange's S&P/TSX composite index was up 53.16 points, or 0.25%, at 21,258.32.

(Reporting by Amal S in Bengalurul; Editing by Amy Caren Daniel)