US-based aerospace manufacturer Boeing had a fundamentally bizarre 2025. On the industrial side, the year was still defined primarily by flight constraints, including tight FAA oversight, delivery bottlenecks, and the slow grind of rebuilding quality discipline after years of crises. The clearest symbol of that hangover was the 777X, where Boeing again pushed the first delivery of the type to 2027 and took about a $5 billion program charge as a result. One would expect these kinds of headlines to financially punish cyclical manufacturers. Despite these extensive and well-documented production challenges (which follow on the heels of a reputational hit), the market treated Boeing more like a turnaround candidate than a market laggard.
Bullish investors have increasingly framed 2025 as a bridge year for the manufacturer, supporting delivery and cash-flow recovery. Boeing’s narrowbody engine production steadied as 737 MAX production reached 38 per month in the second quarter, and the FAA later cleared the company to increase the aircraft’s output to 42 per month. This all comes as 787 Dreamliner deliveries continue to rebuild. With a massive outstanding backlog, the equity valuation story became less about whether demand exists and more about Boeing’s ability to execute given its extensive challenges. In December, Boeing’s CFO said he expects higher deliveries of 737 and 787 aircraft next year to support a return to positive free cash flow in 2026. This forward arc is what we aim to unpack in this analysis. As Boeing’s valuation continues to rise, we keep in mind the ongoing certification challenges that compound and the supply chain difficulties that have only begun to ease.
Boeing’s Unexpectedly Strong Performance
Boeing’s 2025 stock performance looks like a classic rerating. The carrier had previously been trading at a survival discount and has been rerated towards an execution-oriented positive outlook. Boeing shares closed at $171 last January and have since risen above $218, highlighting gains of more than 22%, all during a year when the company faced reputation struggles and analyst downgrades. Throughout the same window, the S&P 500’s year-to-date return was around 18%. This gap emerged late in the year, with analysts highlighting a nearly 16% jump in December that outpaced the Aerospace & Defense sector, which saw in-line-with-market returns of around 2.4%.
The company’s path to such a positive re-rating was not smooth, with the manufacturer taking several headline hits, including a notable 777X program delay that resulted in a multibillion-dollar charge. Shares sold off throughout the summer on this bad news. Nonetheless, operational metrics that slowly turned positive helped reorient the market’s focus, mattering for a levered industrial turnaround that featured production-rate approvals, delivery volume increases, and better cash-flow credibility.
Boeing updates showed 737 production hitting around 38 per month in the second quarter, with the FAA later allowing the carrier to produce up to 42 aircraft per month. The carrier’s delivery figures slowly tracked towards what would be the best airline’s delivery performance in 2018. Management then indicated that higher 737 and 787 Dreamliner deliveries would result in positive free cash flow in 2026, helping convince investors that production and certification delays were not going to result in weaker bottom-line performance. With a total backlog exceeding $600 billion, investors have grown to expect quite a lot from the manufacturer.
What Exactly Led Boeing Stock To Climb In December?
The biggest burst of market-beating performance for Boeing came in December, as investors gained a clearer view into why the manufacturer seems so bullish about its ability to return to positive free cash flow. Early in the month, Boeing CFO Jay Malave told a conference hosted by investment bank UBS that Boeing expects free cash flow to inflect in 2026 into the low single-digit billions. This shifted the narrative around large-scale program stumbles, such as the 777X delay.
This has now led analysts to discuss production metrics that drive equity valuations to support a levered industrial turnaround, with production approvals, deliveries, and ultimately cash flow generation being identified as core drivers. Those signals have only continued to improve, especially with the FAA’s earlier approval to lift 737 MAX output to 42 aircraft per month. Delivery updates have also helped demonstrate how Boeing is tracking towards some of its strongest annual performance metrics since 2018.
In December, investors elected to begin treating those datapoints as confirmation that the company’s recovery is moving from the planning to the execution stage, with incremental positive updates carrying increasingly more weight. Late-month defense headlines, including a Pentagon $2 billion engine-replacement order, which was tied to the B-52 program’s modernization, are also supported by underscoring the continued diversity of the company’s earnings profile. With Boeing’s high market sensitivity and year-end risk appetite being strong, it is unsurprising that this financial performance was amplified. When we add in holiday-thinned liquidity and momentum funds chasing breakouts, this move quickly becomes continually self-reinforcing.
Boeing To Increase Monthly 737 MAX Production To 47 Aircraft In 2026
Boeing is ramping up its production rates.
What Are The Risks To Boeing’s Current Valuation?
Boeing’s current valuation profile is rather risky because it is pricing a multi-year execution rebound while the company is still rebuilding its production stability, quality control, and cash generation capabilities. Analysts making a bullish case anticipate 737 production continuing to ramp up while 787 deliveries also improving, turning free cash flow positive in 2026. Management has talked about how low single-digit billions will be generated next year, according to a recent analysis from Zacks Equity Research.
The longer-term free cash flow target of $10 billion is also extremely ambitious. This means that any slippage in rate approvals, supply chain health, or aftermarket demand could trigger rapid re-ratings. The airline’s equity is also heavily leveraged, reflecting the realities of the manufacturer’s balance sheet. Boeing is currently carrying around $54 billion of total debt (more than $40 billion of net debt), with large amounts due in 2026 and 2027.
Weaker-than-expected cash flow forces refinancing or pushing debt reductions deeper into the future, increasing interest expense in the company’s financials. Program risk has also not disappeared either, with the 777X delay to 2027 costing the company more than $4.5 billion already. Further changes in the development schedule for that marquee program will harm Boeing even further. If another safety or quality setback triggers even tighter regulatory constraints, investors will be forced to reconsider their current sky-high valuations of Boeing.
Are Certification Delays Being Overlooked?
Boeing’s positive stock rerating in 2025 clearly coexists with continued (and rapidly growing) certification risk. Investors are anchoring their theses on the opportunities that increased production could bring, but the question that has emerged is whether they are actually underwriting enough risk from the certification timeline. Both the 737 MAX 7 and MAX 10 programs remain delayed, stuck with outstanding design issues, including an engine anti-ice problem.
As of mid-December, the FAA said that it would review Boeing’s redesigned cockpit alerting system for the MAX 10, an explicit sign that certification work will remain both active and regulator-led. This matters because these variants are not incremental changes to the manufacturer’s portfolio but rather large selling points in and of themselves.
Airlines are expecting to buy these planes to lower unit costs and add seats without adding crews, so that delays can force carriers to extend older fleets, reshuffle growth plans, and lean further into Airbus alternatives. Those operational consequences will often translate into commercial ones, with compensation claims, softer pricing power, and stickier competitive losses all being issues for the manufacturer to manage.
Boeing Has Delivered More Planes So Far In 2025 Than It Did In All Of 2024
The manufacturer has significantly improved its production outlook.
How Did The Broader US Aerospace & Defense Industry Perform In 2025?
In 2025, the Aerospace & Defense sector was a clear standout in the market, materially outperforming equity indices. By late December, the S&P’s Aerospace & Defense Select Industry Index was up around 39% year-to-date, while multiple widely used sector exchange-traded funds (ETFs) climbed significantly higher. Again, the total market return of the S&P 500 was around 18%, underscoring how the sector outperformed.
On the defense side, heightened geopolitical risk and expectations of sustained procurement and replenishment spending supported prime contractors and key suppliers. European defense names were particularly strong, but major American contractors all saw equity valuations rise significantly. With a thriving defense business, this certainly helped Boeing out a lot. The following competitor table highlights Boeing’s performance relative to its American sector peers:
|
Company: |
2025 Total Return: |
|---|---|
|
Boeing (BA) |
22.3% |
|
General Dynamics (GD) |
29.9% |
|
RTX Corporation (RTX) |
60.0% |
|
L3Harris Technologies (LHX) |
41.1% |
On the commercial side, overall demand remained robust, and order backlogs were deep, but engines, parts, and labor still constrained deliveries, all so that aftermarket, MRO, and critical component suppliers would benefit from airlines keeping aircraft in service longer and paying for availability. Mergers & Acquisitions in the sector were also quite active, especially with businesses tied to Boeing and Airbus production growth.
How Do We Feel About Boeing’s 2026 Outlook?
Industry analysts have rerated Boeing based on confidence that the carrier will continue to improve deliveries and monetize the strong demand for its jets. The challenge is that the risks Boeing faces are incredibly high, especially given that a large portion of its backlog is constrained in programs that are in regulatory limbo.
However, when one looks at the manufacturer’s relative performance to the sector that it is in, the carrier’s performance in 2025 seems measured. The company underperformed the broader Aerospace & Defense sector, highlighting that analysts are still underwriting a large amount of execution risk into the company’s valuation.
Analysts who believe the manufacturer will be able to overcome these challenges should have no trouble backing continued investments in the company. For those who think that these kinds of risks remain understated, now could be the time to short-sell Boeing or close out long-only positions.
You made this so easy to understand. Thanks!