Core Viewpoint - Planet Fitness Inc has been upgraded to "buy" from "hold" by Stifel, with a price target increase to $120 from $82, citing stabilizing new membership rates and potential tailwinds for comparable sales growth in the mid- to high-single-digit range over the next several years [1] Group 1 - Shares of Planet Fitness are up 1.4% before market opening, approaching an all-time high of $109.91, with a year-over-year increase of 59% and a year-to-date gain of 5.3% [2] - If premarket strength continues, the stock will achieve its sixth consecutive daily gain [2] Group 2 - Short interest has increased by 27.6% in the past two weeks, with 6.66 million shares sold short, representing 8% of the total available float [3] - At the current trading pace, it would take short sellers more than four days to cover their positions [3] Group 3 - An unwinding of pessimism in the options market may provide additional support, as the put/call open interest ratio stands at 0.83, indicating higher-than-usual put exposure among short-term traders [4]

Group 1 - United Airlines Holdings Inc (UAL) and Delta Air Lines Inc (DAL) have been upgraded to "buy" from "neutral" by UBS, with price targets set at $105 and $96 respectively [1] - UAL shares are currently trading at $79.08, up 1.2% today, but down 18.5% year-to-date; however, they have gained 14% this quarter [1] - DAL shares are trading at $51.16, up 0.5% today, down 15% year-to-date, but have also gained 17% this quarter [2] Group 2 - Both UAL and DAL have been rejected by their 80-day moving averages last week, indicating a similar technical setup [2] - There are no sell ratings on either stock, and the potential for a short squeeze has been exhausted [2] - Options for both UAL and DAL are affordably priced, with their Schaeffer's Volatility Indexes ranking in the 16th and 15th percentiles of their annual range [3] Group 3 - Schaeffer's Volatility Scorecards for UAL and DAL are at 95 and 99 respectively, indicating a history of exceeding option traders' volatility expectations over the past year [3]