Some of the most active companies traded Tuesday on the Toronto Stock Exchange:Toronto Stock Exchange (15,149.60, down 116.44 points):Encana Corp. (TSX:ECA). Oil and gas. Down 39 cents, or 3.38 per cent, to $11.14 on 10.3 million shares.Cenovus Energy Inc. (TSX:CVE). Oil and gas. Down 84 cents, or 8.17 per cent, to $9.44 on 9.4 million shares. The Calgary-based oil company announced plans to sell between $4 billion and $5 billion of assets, cut up to an additional $1 billion in costs over the next three years and the unexpected retirement of CEO Brian Ferguson.Bombardier Inc. (TSX:BBD.B). Aerospace, rail equipment. Up two cents, or 0.77 per cent, to $2.61 on 9.2 million shares. SpiceJet could buy up to 50 additional Q400 planes from Bombardier under a letter of intent signed at the Paris Air Show. If all the planes in the letter of intent are delivered, the order would be valued at up to US$1.7 billion, before discounts.Sandvine Corp. (TSX:SVC). Telecommunications. Up 20 cents, or 5.24 per cent, to $4.02 on 6.8 million shares.Titan Medical Inc. (TSX:TMD). Healthcare. Down three cents, or 17.14 per cent, to 14.5 cents on 4.5 million shares.Telus Corp. (TSX:T). Communication services. Down 29 cents, or 0.64 per cent, to $45.14 on 3.5 million shares.Companies reporting major news:Air Canada (TSX:AC). Airline. Down two cents, or 0.12 per cent, to $17.24 on 481,577 shares. Air Canada’s plans to develop its own frequent flyer program are one of several digitization initiatives the airline is pursuing to meet the varying needs of its 45 million passengers a year, CEO Calin Rovinescu says. Weeks after Air Canada announced it was ditching Aeroplan, Rovinescu said the decision was part of the company’s broader strategy to become more digital in its operations. That includes looking at working with artificial intelligence specialists to recognize patterns in customer data, and employing augmented reality to change how employees learn and collaborate.Home Capital Group Inc. (TSX:HCG). Financial Services. Up 63 cents, or 4.26 per cent, to $15.42 on 2.05 million shares. The alternative mortgage lender is selling $1.2 billion in mortgage assets to real estate-focused private equity firm KingSett Capital as it looks to stabilize its position following a flood of customer withdrawals from their savings accounts. Home Capital expects to lose approximately $15 million on the deal, which will allow it to reduce its debt, after taking on an emergency $2-billion line of credit with onerous terms from the Healthcare of Ontario Pension Plan.