Unusual activity in United Airlines (UAL) call options today highlights investors’ bullish outlook on UAL stock. The Barchart Unusual Stock Options Activity Report shows huge numbers of UAL call options bought at an at-the-money strike price. UAL is at $91.10 today and over 4,000 call options traded at the $92.00 strike price for expiration on Nov. 29, just over 2 weeks away. This was reported in Barchart’s Unusual Stock Options Activity Report today. This volume traded in these calls was 20 times the prior outstanding number of call options contracts, indicating heavy buying initiation activi…