Trump's Iran threat, Berkshire's airline bet, Lululemon's proxy battle and more in Morning Squawk

This is CNBC's Morning Squawk newsletter. Subscribe here to receive future editions in your inbox. Happy Monday. My half marathon in Brooklyn over the weekend ended on Coney Island, and all the signage for hot dogs reminded me of a not-so-fun fact: Frankfurters are over 10% costlier than a year ago. Stock futures are lower this morning. Stocks are coming off a mixed week. Here are five key things investors need to know to start the trading day 1. Another ultimatum U.S. President Donald Trump speaks to the press aboard Air Force One enroute to the U.S. following his official visit with President Xi Jinping in China, May 15, 2026. Evan Vucci | Reuters 2. New direction A Delta Air Lines Airbus A330 airplane departs from Harry Reid International Airport en route to Atlanta on March 15, 2026 in Las Vegas, Nevada. Kevin Carter | Getty Images 3. Punching back A Lululemon store in Vancouver, British Columbia, Canada, on Wednesday, March 11, 2026. Isabella Falsetti | Bloomberg | Getty Images Lululemon wrote in a letter to shareholders Monday that activist founder Chip Wilson has "outdated perspectives" and "troubling conflicts of interest" that will derail the retailer's turnaround plan, CNBC's Gabrielle Fonrounge reports. The letter, exclusively seen by CNBC, is the company's first major public response to Wilson since his proxy battle heated up last year. Materials reviewed by CNBC show settlement talks between Wilson and Lululemon fell apart last week. The athleticwear retailer in its letter urged shareholders to vote in its favor at the company's annual meeting, which it set for next month, stressing its faith in its strategy, incoming CEO and board nominees. Get Morning Squawk directly in your inbox CNBC's Morning Squawk recaps the biggest stories investors should know before the stock market opens, every weekday morning. Subscribe here to get access today. 4. Facing the music Facebook and Instagram icons are seen displayed on an iPhone. Jakub Porzycki | Nurphoto | Getty Images Meta is expected to lay off about 10% of its staff this week. As CNBC's Jonathan Vanian and Julia Boorstin report, the ongoing cuts have created a feeling of dread among the Facebook parent's workforce. Workers across the tech industry are watching stock prices soar while, at the same time, their employers are rapidly cutting heads: According to Layoffs.fyi, there have been almost 110,000 layoffs at 137 tech firms so far this year, already nearing the 125,000 cuts made in 2025. But Wall Street isn't necessarily rewarding AI-related headcount reductions. A CNBC analysis found that among a basket of companies that recently announced layoffs due to AI, the majority of their stocks have dropped since the cuts. 5. Sunset state A Spirit Airlines Airbus A320 parked at LaGuardia Airport in New York days after the carrier ceased operations. Leslie Josephs/CNBC Wondering where Spirit's planes are now that the airline is shut down? There's a good chance they're in the Arizona desert. Companies like Nomadic Aviation Group have been tasked with getting Spirit's yellow aircrafts from airports across the country to holding areas outside of Phoenix and Tuscon. As CNBC's Leslie Josephs reports, unused or retired planes are typically stored in the desert because the climate reduces the likelihood of damage like corrosion. It's not an unexpected development. Airlines housed thousands of planes in the desert when travel was at a near-standstill during the Covid-19 pandemic. The Daily Dividend