David Brancaccio opens by reporting that crude oil has dropped 17% to $94 a barrel in early trading following a U.S.-Iran ceasefire announcement. Dan Coatsworth, head of markets at A.J. Bell in the UK, notes that while oil has pulled back, it remains significantly higher than pre-airstrike levels from late February. Coatsworth cautions that a two-week ceasefire does not resolve the underlying geopolitical situation and that markets remain nervous. He observes that equity markets are staging a relief rally but will need new positive catalysts to sustain momentum. The VIX volatility index, known as the market's fear gauge, falls 22%, while the Dow Jones rises more than 1,200 points, or 2.8%. Marketplace reporter Nancy Marshall-Genzer then covers President Trump's social media post threatening 50% tariffs on any country supplying weapons to Iran, with no exclusions or exemptions. Henrietta Trace, co-founder of Veda Partners, explains that Russia, North Korea, and China have all sent weapons to Iran, but the tariffs are effectively aimed at Beijing because trade with the other two countries is already minimal. Trace also notes that a recent Supreme Court ruling on tariffs may require the administration to conduct a formal investigation before imposing new duties, despite Trump's claim they would take effect immediately. The episode then shifts to a feature segment from Brancaccio's 'Business Envy' series, profiling Bike Oven, a cooperatively run nonprofit bike shop in Los Angeles. Volunteer Melody Scallion explains that Bike Oven refuses to simply repair bikes for customers, instead teaching them to fix their own using a sliding-scale donation model. Scallion describes getting into cycling through 'vegan bike punks' in Westchester, Pennsylvania, before moving to Los Angeles in 2015 and volunteering at Bike Oven for three years. Volunteer Armando Ruiz describes the shop's Adopt-A-Bike program, which takes bikes abandoned at Metro stations, refurbishes them, and gives them away to children for free. Brancaccio participates in a lighthearted exchange where Armando quizzes him on basic bike maintenance knowledge, including the 'ABC' check — air, brakes, chain — which Brancaccio fails. Brancaccio's self-assessed B-minus skill at truing bent rims is deemed genuinely useful by Armando. The shop holds general meetings on the first Monday of every month, where decisions about operations and events are made collectively, with food served. A volunteer known as Reverend Joe closes the segment by reflecting on the diversity of the cycling community — roadies, fixie riders, and others — and arguing that all cyclists in Los Angeles need to unite around the shared goal of riding safely. The episode ends with Brancaccio inviting listeners to email the show about jobs they love, and promoting a Marketplace-organized trip to Tuscany in the fall.