** The insurer's shares fall 6 percent to a 6-month low of C$45.94
** Co posts smaller-than-expected profit on Tuesday, hurt by weak growth in U.S. market
** Co has not topped analysts' profit estimates since the third quarter of 2016.
** "Overall, a relatively 'light' quarter but may perhaps be the low point of the year," analysts at RBC Capital Markets write in a note.
** Credit Suisse cuts rating on co's stock to neutral from outperform
** 6 of 15 brokerages rate the stock "buy", 8 "hold" and 1 "sell"; their median PT is C$54
** TD Securities cuts price target on stock to C$49 from C$53
** Up to Tuesday's close, stock had gained nearly 16 pct over the past year on the Toronto Stock Exchange