Boeing's much-hyped turnaround just hit a speed bump — and Wall Street noticed. CEO Kelly Ortberg told investors Wednesday that stabilizing 737 MAX production at 47 jets a month is taking "a little bit longer" than the company had hoped, an admission that sent shares skidding and reignited doubts about how fast the beleaguered plane maker can truly climb back.

Speaking at the Morgan Stanley Laguna investor conference, Ortberg didn't sugarcoat it. "We are not stable yet at 47 a month," he said, pinning the blame squarely on wing production at Boeing's Renton, Washington plant rather than outside suppliers. "We just have not seen the flow improvements that we expected in the time frame," he added.

Boeing stock closed down roughly 3.7% on the day, sliding from about $209.69 to $201.96, after dropping as much as 2.5% in the immediate aftermath of Ortberg's comments before losses widened through the session, according to CNBC's report on the conference remarks.

The Math Behind the Miss

The stakes are real money. Boeing had been counting on the freshly opened Everett North Line to help push output past 47 jets a month toward a longer-term target of 52 — a milestone the company had previously flagged for the end of 2026. That timeline now looks shaky. Boeing delivered just 41 737 MAX jets in August, down two from July, all fresh off the line rather than pulled from inventory, according to analysis from Leeham News, which tracks the aerospace industry closely.

"The area where we're constrained right now is our wings production... we just have not seen the flow improvements that we expected in the time frame." — Boeing CEO Kelly Ortberg

It's not all bad news out of the conference. Ortberg said certification of the largest MAX variant, the 737-10, is coming "very soon" — though that milestone arrives years behind Boeing's original schedule, a reminder of how much ground the company still has to make up after years of manufacturing and regulatory turmoil following the 2018 and 2019 MAX crashes and last year's door-plug blowout on an Alaska Airlines flight.

Ortberg also poured cold water on hopes of a blockbuster Chinese order landing alongside any planned meeting between President Trump and President Xi Jinping in Washington, suggesting investors shouldn't bet on a major deal materializing from that diplomacy.

The reaction from investors was swift but not panicked — Boeing shares remain well above their 2026 lows, and the stock's slide tracked a broader market pullback after the Federal Reserve's rate decision earlier in the week. Still, the production admission underscores how fragile Boeing's recovery narrative remains: every month the 47-a-month rate stays unstable pushes the more lucrative 52-a-month rate further out, delaying the cash-flow boost investors have been waiting on.

Boeing's next scheduled earnings report will offer the clearest read on whether Renton's wing bottleneck is easing. Until then, expect analysts to keep close tabs on monthly delivery counts — the closest real-time proxy Wall Street has for judging whether Ortberg's promised stabilization is finally taking hold.