How to Invest in Hydrogen

Before you buy anything, it helps to know that “hydrogen” is not one kind of company. The theme covers several very different businesses, and a stock or a fund behaves differently depending on which link of the chain it sits in.

• Electrolyzer makers. They build the equipment that splits water into hydrogen using electricity. This is where a lot of the “green hydrogen” hope lives, and where most companies are still pre-profit.
• Fuel-cell companies. They build the devices that turn hydrogen back into power for forklifts, trucks, and backup systems. Names like PLUG, BE, and BLDP largely live here. Big potential markets, but mostly unprofitable today.
• Industrial-gas incumbents. Companies like LIN and APD already produce, compress, and distribute hydrogen at scale as one line of a much larger, profitable business. They sit across the whole chain and are far steadier.

The key split is pure-plays (electrolyzer and fuel-cell companies whose entire business is hydrogen) versus the incumbents (industrial-gas giants for whom hydrogen is one profitable slice among many). You can explore the names together in the hydrogen and fuel-cell theme.

You need a brokerage account to buy any stock or fund. The account wrapper affects your taxes more than which hydrogen holding you pick, so choose it deliberately.

• A tax-advantaged retirement account first. If you have a 401(k) with a match, or a Roth IRA, holdings there grow without yearly tax drag. Most people fund these before a taxable account. A speculative theme like hydrogen is one many people deliberately keep out of core retirement money, though.
• A standard brokerage account for anything beyond your retirement contributions, or if you want full flexibility to buy and sell individual names.

Any major US broker works, and most now charge no commission on stock and ETF trades, with fractional shares that let you start small, which is useful for a theme you want to size modestly.

This is the central choice, and it is really a choice about how much risk you want. Here are the three main ways into the theme side by side.

The ETF route. A hydrogen ETF such as HYDR or HDRO holds a basket of hydrogen and fuel-cell companies, so a single blow-up does not sink you. It is the simplest way to own the theme broadly, but remember the whole basket is still a narrow, volatile thematic bet, not a diversified fund. Our best hydrogen ETFs guide compares the fund options in more detail.

The individual-stock route. Buying names directly means you control the mix. You can lean into the speculative pure-plays (PLUG, BE, BLDP), stick to the safer incumbents (LIN, APD), or blend both. This is not a suggestion to buy any of them; it is what a typical hydrogen basket tends to contain. Our best hydrogen stocks guide breaks the names down.

This is the step most hydrogen guides gloss over, and it is the one that matters most. The pure-play fuel-cell and electrolyzer stocks that get the most attention are among the more speculative holdings you can buy.

• Most are not profitable. Companies like PLUG, BE, and BLDP are spending heavily to build technology and capacity before their end markets are large enough to support them. They burn cash, and the path to consistent profit is far from certain.
• They often raise money by issuing shares. To fund those losses, cash-burning companies frequently sell new stock, which dilutes existing holders. That is a real, recurring headwind, not a one-off event.
• They trade on sentiment and policy. Prices swing sharply on subsidy news, government targets, and hype rather than earnings, so the ride is volatile in both directions.
• Losses can be large or permanent. There is genuine upside if hydrogen adoption accelerates, but there is also a real risk that a given company never gets there. This is money you should be prepared to see fall a long way.

The incumbents (LIN, APD) do not carry the same profile: they are profitable, established businesses where hydrogen is one line among many. The trade-off is that your hydrogen exposure is diluted. None of this is advice; it is the honest shape of the risk so you can decide with your eyes open.

Because hydrogen, and especially the pure-plays, sits at the speculative end of the market, how much you hold deserves real thought before you place a trade.

• Treat it as a satellite, not a core. Many people who invest in a theme this speculative keep it to a small slice of the overall portfolio rather than a central holding.
• Size it as money you can afford to lose. Sized so that even a sharp drop, or a total loss on that slice, would not derail your overall plan is the honest way to think about a speculative theme.
• Choosing incumbents lowers the risk, not the need to size. Even the steadier industrial-gas route is a concentrated bet on a narrow theme, so a modest position still makes sense.

There is no correct percentage, and this is not advice. The point is that with a theme this volatile, restraint is the tool that protects you.

A hydrogen tilt works best as one small part of a broader portfolio, not the whole thing. The discipline here is boring on purpose, and it is what keeps a speculative bet from defining your results.

• Hold a diversified core. Keep a broad index fund and exposure well beyond any single theme so one narrow bet going wrong does not upend your plan.
• Do not add on the hype. Piling in after a big run, or selling in a panic on a drop, is how thematic investors underperform. If you hold hydrogen, hold it as a long-term position sized deliberately.
• Revisit the thesis, not the price. Check whether the reason you bought (adoption, policy, technology) is still intact rather than reacting to every swing.

Hydrogen is exactly the kind of theme where sizing and honesty matter, and that is where Walnut is useful. If you want to add a hydrogen tilt or a basket of individual names, Walnut lets you build that basket, set target weights, and see how it would have tracked against a benchmark, so a speculative tilt has to earn its keep. It can also show how much of the theme you already own through your existing holdings before you add more. You connect your real broker, chat through Claude, ChatGPT, or built-in AI, and place trades you approve yourself. Walnut does not tell you what to buy.