Canopy Growth Corporation (NASDAQ:CGC) shares are trading lower by 12% on heavy volume, following a 20% rise on Monday. The company recently recognized the successful commencement of trading of TerrAscend Corp. on the Toronto Stock Exchange, in which Canopy has an approx 18% stake. The earlier rise in CGC shares was due to the completion of a series of balance sheet actions aimed at reducing costs and increasing profitability.