If someone is pitching you a long/short strategy primarily as a way to generate tax losses, stop and ask a different question first: do you actually believe this manager can pick stocks?
That question matters more than any tax benefit they’re about to describe. And it’s the one that most of the marketing materials gloss over.
Here’s the honest version of how these strategies work, who they’re actually designed for, and what can go seriously wrong if you skip the first step.
What Is a Tax-Aware Long/Short Strategy?
The mechanics are simpler than the name suggests.
In a traditional portfolio, you invest your capital into a diversified set of long positions, meaning stocks you expect to rise. A long/short extension strategy does something different.
Take a 130/30 portfolio as an example. The manager invests your $100 of capital into stocks they believe will outperform. Then they borrow an additional $30 using margin and put that into more long positions. At the same time, they sell $30 worth of stocks short, meaning they borrow shares and sell them, betting those companies will underperform.
The result: $130 in long positions and $30 in short positions, with roughly $100 of net market exposure. The long and short positions largely offset each other, so your overall equity exposure stays close to a traditional portfolio’s level. You’re not making a leveraged bet on the market going up. You’re making a bet that the manager can identify winners and losers better than the market can.
A 200/100 portfolio uses the same structure on a larger scale: $200 in long positions, $100 in short positions, still roughly 100% net equity exposure.
These are sometimes called extension strategies or long/short SMAs (separately managed accounts). They’re typically implemented in a taxable brokerage account, not a hedge fund structure.
This Is Active Stock Picking. Full Stop.
Here’s where the conversation has to start: long/short strategies are, above all else, active investment management.
The manager is making two sets of decisions constantly. Which stocks to own and which stocks to short. That’s twice the surface area for getting it right or getting it spectacularly wrong. The tax component doesn’t change that calculus at all.
Think about what you’re actually agreeing to when you invest in one of these strategies:
You’re hiring a manager to identify stocks that will outperform. You’re also hiring that same manager to identify stocks that will underperform and short them using borrowed money. If they’re wrong on the longs, you underperform. If they’re wrong on the shorts, you can lose significantly more than you would in a plain index fund. And if they’re wrong on both at the same time, which has happened, the tax losses you harvested won’t save you.
The Schwab Center for Financial Research laid this out clearly in their February 2026 paper. In their example, a manager who generates pre-tax stock alpha of 1.6% combined with tax alpha of 5.8% can deliver after-tax alpha of 7.4%. But a manager who produces negative pre-tax alpha of -6.9% through bad stock picks on both the long and short sides still captures that same 5.8% in tax benefits. The after-tax alpha in that scenario? Negative 1.1%. The tax benefits didn’t save the investor. They just made a bad situation slightly less bad.
The lesson from Schwab’s own research: “Investors should not focus on tax alpha in isolation but also assess the manager’s underlying stock-selection capability.”
That’s the crux. The tax planning benefits can be real and substantial. But they’re layered on top of the investment strategy, not underneath it.
If you don’t believe the manager is a skilled stock picker, you shouldn’t be in the strategy at all. The tax benefits aren’t worth sacrificing pre-tax returns.
What Can Go Wrong: The Risks You Need to Understand
Short Squeezes
This one deserves special attention because most investors underestimate it.
When a manager shorts a stock, they borrow shares and sell them, expecting the price to fall. If instead the price rises sharply, short sellers face mounting losses and often rush to buy shares back to cover their positions. That buying pressure pushes the price even higher, which forces more shorts to cover, which drives the price higher still. That spiral is a short squeeze.
Short squeezes can be fast and brutal. There’s theoretically no ceiling on how high a stock can go, which means there’s theoretically no limit on losses from a short position. During the 2021 GameStop episode, hedge funds with short positions reportedly lost more than $10 billion. Hertz surged over 56% in a single day in April 2025 after an unexpected investor disclosure triggered a squeeze in a heavily shorted stock.
A long/short manager doesn’t need to be shorting meme stocks to face this risk. Any crowded short position in a rising market, or a position where shares become scarce and borrowing costs spike, can create the same problem. The Schwab paper describes this scenario explicitly: when shorts rise significantly more than the index during a market rally (a junk rally or short squeeze), negative pre-tax alpha can completely offset whatever tax alpha the strategy was generating.
Leverage and Volatility Risk
More gross exposure means more sensitivity to market moves in both directions. A 200/100 strategy with 300% gross exposure isn’t just twice as volatile as a passive index fund. It’s leveraged in ways that can amplify drawdowns significantly in stressed markets.
During the 2008 financial crisis, 130/30 strategies fell an average of 43.1% during the bear market, compared to 40.9% for long-only funds. Many strategies that had been pitched as sophisticated closed because they failed to deliver on their promises. A subsequent study found the surviving long/short strategies also lagged the S&P 500 during the recovery. The leverage that amplifies your ability to generate tax losses also amplifies your exposure when markets move against you.
The Tax Deferral (Not Elimination) Reality
Something managers often underemphasize: tax losses harvested today don’t disappear. They lower your cost basis. If the strategy eventually gets unwound, or if positions rebound and are later sold at a gain, those gains become taxable in future years. You’ve deferred the tax bill, not eliminated it.
The Schwab paper is direct about this: “Tax costs of capital gains are deferred, not eliminated.”
Additionally, gains from short positions are generally taxed as short-term capital gains regardless of how long the position was held. That’s a headwind in any year where the strategy generates net gains on short positions.
Manager Complexity and Operational Risk
Running a long/short book is operationally demanding. Sourcing shares to borrow isn’t always easy. Borrow availability can be limited, costs can spike, and positions can be forced closed at disadvantageous prices. As Brent Sullivan, who runs the Tax Alpha Insider blog, put it: “The operational reality is that sourcing shorts is more fragmented and challenging than many initially anticipated.”
What Schwab and Fidelity Tightening Standards Tells You
This is a new development worth knowing about.
In April 2026, Charles Schwab, which custodies the majority of RIA-managed assets, rolled out meaningful new restrictions on long/short separately managed accounts. The new rules cap how much of an RIA’s total Schwab custody assets can go into long/short SMAs at 30%. Minimum account sizes are now $1 million for standard Reg T margin accounts (typically used for 130/30 and 145/45 strategies) and $3 million for portfolio margin accounts used for higher-leverage structures like 200/100. Leverage is also capped: 200% of principal for long positions and 100% for short positions.
Schwab isn’t alone. Fidelity had already stopped opening new long/short accounts before Schwab’s announcement.
What does this signal? Custodians are managing risk. Schwab had $21.3 billion of its total $126.7 billion margin loan balance tied to RIA long/short strategies as of March 2026. That’s a real concentration of leverage and operational complexity on their platform, and they’re pumping the brakes in a measured but clear way.
For investors, the takeaway is straightforward: even the major custodians view these strategies as requiring careful constraints. They’re not products that every investor with a taxable account should be running.
Who This Strategy Is For and Who It Isn’t
Who it may fit well
These strategies tend to make the most sense for investors who:
Have a large taxable gain they need to offset, whether from a concentrated stock position, a business sale, real estate, or a significant liquidity event. Have substantial taxable assets. Schwab’s new minimums set the eligibility floor at $1 million for standard accounts and $3 million for higher-leverage structures, but practically speaking, most advisors find the fees, complexity, and risks are hard to justify below $5 million in taxable assets. Are already in the highest tax brackets and expect to remain there. Genuinely believe in the specific manager’s ability to pick stocks and manage short exposure, not just the tax benefit narrative. Are comfortable with active management, leverage, margin, and performance that may differ materially from a broad index. Have a long enough time horizon to ride out drawdowns that can emerge from short squeezes or market dislocations.
Research from the Journal of Asset Management (Goldberg, Cai, and Schneider, 2024) found that 130/30 portfolios generate roughly 2.7 times more capital losses than long-only portfolios over the first 10 years. For investors with a sufficient and ongoing supply of gains to offset, that can translate to pre-liquidation tax alpha of around 4.4% per year. But the same research found that if the investor lacks short-term capital gains to offset, or if the strategy is liquidated early, that tax advantage shrinks substantially.
Who it’s probably not right for
These strategies are less likely to be appropriate for investors whose primary goal is generating tax losses without genuine conviction in the manager’s stock-picking ability, people who prefer low-cost passive investing and aren’t comfortable with active management, investors with most of their wealth in tax-deferred accounts where the tax benefits have no application, anyone with a shorter time horizon who might need to exit during a drawdown, and investors who are sensitive to performance that looks very different from the S&P 500.
The Tax Benefits, Explained
When a manager’s short position loses money (meaning the stock they shorted went up), that realized loss can be used to offset capital gains elsewhere in your portfolio, whether from other securities, real estate sales, or business proceeds.
Long positions that are sold at a loss work the same way.
The advantage of the long/short structure is that it creates more opportunities to harvest losses than a traditional long-only portfolio, because both sides of the trade can generate them. In a rising market, your short positions tend to lose money. In a falling market, your long positions tend to lose money. That continuous loss-harvesting capacity is the genuine tax benefit.
But here’s the key thing to hold onto: those tax losses lower your cost basis in the portfolio. When you eventually exit the strategy, you’ll likely owe taxes on gains that reflect the accumulated basis reduction. The tax benefit is real, but it’s a deferral. In high-leverage strategies that get unwound suddenly, the tax bill at the end can be significant.
A Structural Tool, Not a Silver Bullet
Used correctly, long/short strategies can complement a broader planning approach for the right investor. They can help a tech executive with $5 million of concentrated RSUs diversify more quickly. They can help a business owner who just sold their company deploy capital efficiently while offsetting the sale gain. They can serve as a meaningful component of a multi-year tax management plan when coordinated with charitable giving, asset location, and estate planning.
But they work in that context because the underlying investment strategy is sound. The tax benefits amplify good outcomes. They don’t rescue poor ones.
The question to ask before committing isn’t “how many losses can this generate?” It’s: “Do I genuinely believe this manager can pick longs and shorts better than the market, over time, net of their fees, the cost of borrowing, and the operational complexity?”
If the answer is yes, and the tax benefits align with your planning needs, this tool may be worth exploring.
If the answer is uncertain, or if the pitch is leading with tax benefits rather than investment merit, that’s your signal to slow down.
A Quick Note on the Landscape Right Now
Schwab’s April 2026 restrictions and Fidelity’s earlier pause on new accounts reflect a broader maturation in how the industry is thinking about these strategies. They became popular rapidly, and in some cases were marketed aggressively to investors who may not have fully understood what they were buying. The custodian-level guardrails are a healthy correction.
For advisors and investors, this means account minimums are higher, leverage in the most aggressive structures will be constrained, and platforms may not support every variation of the strategy going forward. Investors entering now should factor that into their planning, including the possibility that exiting a strategy or switching managers might trigger a taxable event from position unwinding.
Sources
Long-Short Strategies for Concentrated Position Management – Schwab Center for Financial Research, February 2026
Schwab Imposes New Limits on RIAs Using Long-Short Strategies – AdvisorHub, April 2026
Schwab Sets New Limits on Tax-Aware Long-Short Accounts as Demand Grows – Bloomberg, April 2026
Schwab Creates New Limits to RIAs Using Long-Short Separately Managed Accounts – InvestmentNews, April 2026
A Guide to 130/30 Loss Harvesting – Goldberg, Cai & Schneider, Journal of Asset Management, 2024
Diversify Concentrated Stock with Long/Short – BlackRock/Aperio, 2024
What’s a Short Squeeze and Why Does It Happen? – Charles Schwab
Disclosure
This article is for general informational and educational purposes only. It isn’t personalized investment, tax, or legal advice, and it shouldn’t be relied on as a substitute for guidance specific to your situation. Inclinevest LLC is a registered investment adviser.
