LUV vs NI: Which Is the Better Buy in 2026?
Last updated August 2026
Short answer
LUV and NI are similarly sized, but LUV trades noticeably cheaper on forward earnings (9.10x vs 18.80x): the market is paying up for NI's profile and pricing LUV more conservatively, or for faster growth. Which you prefer comes down to the drivers you believe, and whether adding either over-concentrates what you already own.
LUV vs NI: the tie-breaker metrics
Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.
| Metric | LUV | NI | What it tells you |
|---|---|---|---|
| Market cap | $22.00B | $20.32B | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | 9.10 | 18.80 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Trailing P/E | 28.11 | 22.54 | Valuation on the last 12 months. A big drop from trailing to forward means the market expects earnings to jump, so more growth is already in the price. |
| Beta | 1.12 | 0.55 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 61% of range | 36% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 3.11 | 2.10 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Reading it: LUV is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.
Before you buy: how LUV and NI affect your concentration
The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. LUV and NI share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.
This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined LUV and NI exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.
What does Southwest Airlines (LUV) do?
Southwest Airlines operates a point-to-point domestic US network built around a single fleet type, the Boeing 737, which historically kept training, maintenance, and scheduling costs low. For more than five decades the carrier ran on open seating, two free checked bags, and a no-frills brand that made it the archetype of the American low-cost airline. That model is now being dismantled: in 2025 Southwest introduced checked-bag fees (roughly $35 for the first bag and $45 for the second) and basic-economy-style fares, and on January 27, 2026 it ended open seating and began selling assigned and extra-legroom premium seats.
What does NiSource (NI) do?
NiSource operates two reportable segments. Columbia Operations is the natural gas distribution business, made up of the Columbia Gas utilities in Ohio, Pennsylvania, Virginia, Kentucky and Maryland. NIPSCO Operations covers northern Indiana, where the company runs both a gas utility and a vertically integrated electric utility that has been retiring coal generation and replacing it with wind, solar, batteries and, most recently, new combined cycle gas capacity. Roughly 7,700 employees serve about 3.3 million natural gas customers and about 500,000 electric customers. Revenue was approximately $6.9 billion on a trailing twelve month basis through the June 2026 quarter, and essentially all of it comes from rates set by state commissions rather than from competitive markets.
LUV vs NI: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- LUV drivers: Product monetization and premium mix; Cost discipline and CASM.
- NI drivers: A capital plan sized to the opportunity; Indiana data center load, contracted and approved.
Which fits which kind of investor
A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Southwest remains almost entirely exposed to US domestic leisure and business demand, so any economic softening or pullback in travel hits revenue directly. For NI, financing is the central risk.
LUV or NI: which should you pick?
LUV vs NI: the full fundamentals
LUV. Southwest returned to profitability in Q1 2026 on record first-quarter revenue, reversing a year-ago loss as new product initiatives lifted unit revenue by double digits. Management reiterated a roughly $4.00 full-year adjusted EPS target and guided Q2 RASM up meaningfully year over year. The P/E near 33x on trailing earnings reflects a stock priced on the expectation that the margin recovery continues rather than on current earnings alone.
NI. At roughly 22.6x trailing GAAP earnings and about 21x the midpoint of 2026 adjusted guidance, NiSource trades at a premium to the typical regulated gas utility, which is the market pricing in the data center growth rather than the current earnings stream. Quarterly numbers are seasonal and can look alarming out of context: second quarter 2026 GAAP EPS was $0.09 against $0.22 a year earlier, while first half adjusted EPS still rose to $1.22 from $1.19. The GenCo structure also matters for anyone comparing per share figures, because Blackstone's minority interest sits in noncontrolling interest and absorbs part of the generation economics.
Headline figures (approximate, APRIL 2026): LUV shows revenue (q1 2026) ~$7.25B, revenue (ttm) ~$27B, net income (q1 2026) ~$227M, diluted eps (q1 2026) ~$0.45; NI shows revenue (ttm) ~$6.9 billion through the June 2026 quarter, market capitalization ~$20.3 billion (~$42 per share on ~480 million shares), diluted eps (ttm, gaap) ~$1.88, a trailing P/E of roughly 22.6x, 2026 adjusted eps guidance $2.02 to $2.07, reaffirmed August 5, 2026 (~21x at recent prices).
The bottom line: LUV vs NI
LUV and NI are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined LUV and NI exposure against your real portfolio. It is not an investment adviser.
Wondering how LUV or NI fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in Southwest Airlines with AI
Connect the broker you already use and ask Walnut's AI how LUV fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between LUV and NI?
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Southwest Airlines operates a point-to-point domestic US network built around a single fleet type, the Boeing 737, which historically kept training, maintenance, and scheduling costs low. NiSource operates two reportable segments. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is LUV or NI the better stock?
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Neither is universally better; they suit different views and risk levels. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, LUV or NI?
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On forward P/E (as of August 2026), LUV trades at 9.10x and NI at 18.80x, so LUV is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both LUV and NI?
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Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of LUV vs NI?
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LUV: Southwest remains almost entirely exposed to US domestic leisure and business demand, so any economic softening or pullback in travel hits revenue directly. Its single-fleet reliance on Boeing means MAX certification slips and delivery shortfalls (more than 100 fewer aircraft than contracted in 2026) directly limit growth and keep less efficient jets in service. Jet-fuel prices are volatile and rose year over year in Q1 2026, pressuring margins. The product overhaul itself carries execution risk: bag fees and the end of open seating could alienate loyal customers, and Southwest's own estimates once suggested bag fees might net out roughly flat after lost demand. Labor costs and contract negotiations add further pressure in an intensely competitive industry. NI: Financing is the central risk. Funding a $28.6 billion program while already carrying roughly $17.4 billion of debt means continued bond issuance at 2026 coupons (the May 2026 notes priced at 4.75% and 5.30%) plus equity issued through an at-the-market program, and share count has already drifted from about 470.7 million in April 2025 to about 479.6 million in July 2026, so per share growth can lag rate base growth. Regulatory risk is constant: allowed returns can be trimmed, cost recovery can be delayed, and the pending Indiana and FERC approvals tied to the Amazon and Alphabet arrangements are not decided until the fourth quarter of 2026. Customer concentration is a newer exposure, since a meaningful slice of future earnings depends on a small number of hyperscaler counterparties and on data center demand in northern Indiana holding up over contract lives measured in decades. Operationally, the R.M. Schahfer coal facility was scheduled to retire at the end of December 2025 but has been kept running under successive federal emergency orders, currently through September 19, 2026, which illustrates how reliability obligations and transition plans can collide. Gas distribution earnings also swing with weather, and pipeline safety obligations under PHMSA carry both cost and, as the industry's history shows, tail risk.
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Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell LUV or NI; figures are approximate and dated (as of August 2026). Verify current data before investing.