The Case For Buying Airline Stocks: The “Down 30 In 30” Trading Rule, And More

To state the obvious, this blog isn’t about investing (well, other than “investing” in your points balance), 😉 though I do often discuss airline economics, and sometimes the topic of airline stocks comes up.

While I’m interested in investing, I’m by no means a financial expert, so please don’t interpret any of this as financial advice, or anything like that. This is just an airline nerd sharing his (probably baseless) opinions, so take it with a grain of salt. However, here’s a topic that I find interesting — under what circumstances are airlines worth investing in through the stock market… if ever?

It’s hard to argue that airlines make good long term investments

I absolutely adore the airline industry, though there’s no arguing that it’s an incredibly challenging business. At least in the United States, airlines have very high fixed and variable costs, unionized workforces with labor contracts that can’t easily be renegotiated, and they’re always the first to suffer in hard times.

Warren Buffett once famously joked that if a farsighted capitalist had been present at Kitty Hawk in 1903 (when the first flight took place), he should have shot Orville Wright.

Keep in mind that before the pandemic, Buffett’s Berkshire Hathaway was the largest shareholders of US airlines. Those stakes were all panic sold at the start of the pandemic, when they were at absolute lows. Interestingly, Berkshire Hathaway recently got back into airline investing, buying a stake in Delta.

There’s no denying that the US airline industry at large has made massive progress when it comes to becoming more sustainable. That’s largely because US airlines have figured out how to tap into loyalty programs as major profit centers, though not all airlines benefit equally from that. Airlines have also gotten much better at monetizing their products, which is a double-edged sword for consumers.

Looking at US airlines, the absolute top airlines might have a margin of 10% in good years, while most players still lose money. And when things go wrong? Well, they’re quickly begging taxpayers for a bailout to stay afloat.

Let me be clear, there are certainly situations where airline stocks appreciate over time, even without “buying the dip,” so to speak. For example, if you purchased United stock in mid-2023 at its rough peak at the time, you would’ve seen a roughly 100% return over that period, compared to the stock price today. Pretty great, eh? And if you bought during a dip, you might’ve even seen a return of closer to 200%.

United’s turnaround, and in particular, the company’s narrative, is something we haven’t otherwise seen replicated much. You would’ve seen healthy returns with Delta stock as well, but not as high, given that the airline was already the leader at the time.

Admittedly Delta and United are the two airlines that do quite well, and we won’t look at the stock prices of other airlines, which are a bit less pretty. 😉

The two scenarios where I see merit to investing in airlines

More broadly speaking, when is there merit to investing in airlines? As I see it, there are two situations where it most makes sense:

• If you think an airline will be a target in consolidation
• If you’re just “buying the dip,” and think the price will quickly recover

I think there’s an argument to be made for buying airline stock if you think an airline will be the target of consolidation, though this is highly risky, and the upside isn’t always huge:

• I think the dream scenario is what Hawaiian Airlines saw when it was acquired by Alaska Airlines, where the stock went from under $5 to over $13 virtually overnight, given Hawaiian’s low share price and Alaska’s (relatively) high purchase price
• In fairness, we’ve also seen successful consolidation with minimal immediate upside; Allegiant recently acquired Sun Country, and that results in a premium of “only” around 20% (still good, but I think a 160% premium sounds better) 😉
• Of course many people gambled with JetBlue’s failed takeover of Spirit, and tried to buy Spirit shares, in hopes the deal would get regulatory approval; those people got burned, when a judge blocked the merger
• I’m sure many people have purchased JetBlue stock, with hopes of the carrier being acquired, though that’s looking less and less likely by the day; given the amount of debt JetBlue has, I also struggle to believe the airline would get a huge premium on its share price

I think the other argument to be made for buying airline stocks is essentially to just “buy the dips,” when things get bad, and the market overreacts. I’m reminded of the September 2025 Airlines Confidential podcast, hosted by Scott McCartney, where JPMorgan airline analysts Jamie Baker and Mark Streeter were guests (they’re both awesome guys, and you’ll hear Baker on just about every airline earnings call, and I always enjoy hearing his questions, as he doesn’t hold back).

They talked about JPMorgan’s airline investment strategy, and brought up the “down 30 in 30” trading rule. Essentially the idea is that if an airline stock loses 30% of its value in 30 trading days, there’s a high chance that this was an overcorrection, and the stock will go up quite a bit in the subsequent 180 trading days a large majority of the time.

The example they give (and this might not be 100% accurate, since they were going off memory) is that there were 29 instances where United (or pre-merger Continental) stock lost 30% of its value in 30 or fewer trading days.

The analysis was that if you purchased the stock at the very first instance where it dropped 30%, over the course of the following 180 trading days, there’s a 71% likelihood of generating greater than 50% returns, with the average being that the investment roughly doubles. And keep in mind you can do better than that potentially, since this doesn’t even assume buying at the bottom.

The idea is that when the market has decided so quickly that things are so bad, the market has routinely been incorrect. Interestingly, during the recent Iran conflict, most airline stocks didn’t quite drop that much, though American did (probably because it’s the least financially secure among the “big four”). Before the conflict, on February 6, American’s stock price was $15.24, and within 30 trading days, it fell to $10.30, a decrease of well over 30%.

A few months later, the stock is trading at $14.34 again (and days ago it was at $14.92), so that’s a nearly 50% increase in stock price within roughly a few months (and that’s not even 180 trading days).

Everyone should use their own judgment, but when you look at the charts, it does seem like one of the areas where airlines beat the market (on average) is when it comes to the depth of the dips, and the speed of recovery, given the industry’s volatility, and the panic selling that happens.

Interestingly, Baker and Streeter argued that long term they think it’s increasingly likely that you’ll be able to park money in airlines and generate above average returns on a three to five year horizon. If you time things right, that’s probably true. The issue is how few airlines are actually “healthy,” and just how much can change over a three to five year period.

Bottom line

Airlines are really tough businesses, and personally (as a non-financial expert), I fail to see merit to investing in them in the long run, given that we have access to a broader market. There are just so many other industries with better potential for higher returns, and with less volatility.

That being said, I’d argue there are two situations where you can come out ahead investing in airlines. One is if you think consolidation is likely, though that also comes with huge risks — there’s upside, but the airlines that are targets of consolidation also often aren’t in a great spot.

The other — and it’s still risky, but less so than hoping for a merger — is following the “down 30 in 30” trading rule. If an airline stock drops 30% in 30 trading days, it’s highly likely the stock will go up by at least 50% over the course of 180 trading days. There’s no guarantee, of course, but better than two-thirds odds sound pretty good to me, especially when the upside is often significantly more than 50%.

Where do you stand on buying airline stocks? Under what circumstances do you think it makes sense?