Shares of Canopy Growth Corp. surged 3.9% in premarket trade Friday, to bounce off the previous session's 3-month closing low, after Canada-based cannabis company said it will join the S&P/TSX 60 Index. The company, which went public 5 years ago on the TSX Venture Exchange, will be the first cannabis company to be included in that large-capitalization index, Canopy said. Separately, Canopy's wholly-owned subsidiary Spectrum Cannabis announced Friday a partnership and endorsement from CARP, which the company said was the largest advocacy group for aging Canadians. Canopy's stock has rallied 49.2% year to date through Thursday, while the ETFMG Alternative Harvest ETF has run up 40.3% and the S&P 500 has gained 15.2%.