Addressing Concentrated Stock Positions: The Role of Long-Short Investing

A concentrated stock position is rarely one problem with one answer. The right response depends on how the position was built, the size of its unrealized gains, any trading restrictions, the owner’s goals, any personal attachments to the position, and the tax consequences of change. That’s why a strategic, situation-specific approach is best—to assess each concentration on its own terms, then draw on a range of tools to address it.  

Long-short investing is one of those tools. Used well, it can help an investor either: 1) manage a concentrated position they intend to keep, or 2) unwind one they intend to reduce, often with meaningful tax advantages along the way. It’s not a cure-all, and it’s not the right answer in every situation. But in the right circumstances, it’s one of the most flexible instruments available. 

Why Concentration Deserves Attention 

A single stock is typically far more volatile than a diversified index. When a single company dominates portfolio outcomes, financial well-being becomes closely tied to company-specific factors: earnings variability, regulatory shifts, leadership changes, and industry disruption, among a long list of others. Reducing that dependence, on a timeline and in a controlled manner, is the goal. And long-short investing is one way to pursue it. 

What Long-Short Investing Means in This Context 

A long-short strategy holds two sets of positions: long positions in securities that a manager expects to perform well, and short positions in securities that the manager expects to lag. For an investor with a concentrated position, the strategy typically operates alongside or around the concentrated holding, usually in a separately managed account, and can be designed to serve one or two purposes: offsetting the risk of a position that will be kept, or systematically absorbing the tax cost of a position that will be sold down. 

One structural feature drives much of the value in both cases. Because the strategy holds both longs and shorts, some positions decline from their initial entry price in almost any market environment. Those declines can be realized deliberately as capital losses, while gains are deferred, giving the portfolio a steady supply of harvested losses that can be put to work against the concentrated position. 

The Tax Advantage: Deferral, Powered by Active Loss Harvesting 

This is the most underappreciated benefit of pairing long-short strategies with concentrated stock. Harvested losses accumulate year over year, and can be used in two ways: 

• Deferring gains while risk is addressed. Portfolio-level risk can be reduced without selling the concentrated position, which means taxable decisions can be sequenced rather than rushed. Gains can be realized across multiple years, aligned with income variability, or coordinated with planned liquidity events, charitable contributions, or estate planning strategies that may reduce taxes for heirs. 
• Offsetting gains when shares are sold. Losses banked by the strategy can absorb some or all of the capital gains realized when the concentrated position is trimmed, which is what makes the unwinding path, described further below, feasible.  

The framework emphasizes intentionality over avoidance. Taxes remain inevitable, but long-short investing can help ensure that realization occurs on a schedule consistent with a broader financial plan, often improving long-term after-tax outcomes by avoiding forced, poorly timed transactions. 

Managing the Position: Holding with Less Dependence 

For an investor who intends to keep the position, whether for its continued upside, professional or emotional significance, or company-related trading restrictions that limit selling, long-short investing can reshape the risk around it in several ways: 

• Offsetting exposure without a sale. Short positions in companies that share the stock’s sector and style characteristics—but are not substantially identical positions—can offset a portion of its risk while ownership, dividends, and upside optionality remain intact.  
• Diversifying the drivers of return. Long-short strategies can generate returns from the performance gap between stronger and weaker companies, as well as from a variety of market, style, and factor exposures. This does not eliminate risk; it transforms it, so that the concentrated holding no longer singularly determines how the portfolio behaves. 
• Supporting better decisions. When outcomes no longer hinge on one variable, reactive selling and other emotionally driven decisions tend to decline. This is an advantage that matters most to executives, founders, and first-generation wealth holders whose net worth and identity are tied to one company. 

Unwinding the Position: A Tax-Managed Exit 

For many investors, the right answer is not to hold the position, but to reduce or eliminate it. The obstacle is usually tax: selling a large position with a significant built-in gain all at once concentrates the taxable gain in a single year, often at the highest rates. Long-short investing offers a middle path between holding everything and selling everything: 

• Shares are sold in stages, on a planned schedule, rather than in reaction to market events. 
• Gains realized at each stage are partially or fully offset by losses the strategy has harvested. 
• Proceeds are redeployed into the diversified strategy as the sell-down progresses, so the portfolio arrives at its destination invested, not in cash. 

Over a defined horizon, the concentration is reduced or eliminated with materially less tax drag than an outright sale, and the pace can accelerate or slow as markets, tax law, and life circumstances change. Liquidity needs, retirement timing, business transitions, and estate milestones can all be accommodated within a plan-led framework, without forcing abrupt or binary decisions. 

Integration With Charitable and Legacy Planning 

Highly appreciated stock is among the most efficient assets for charitable and legacy planning, but only if it’s not prematurely liquidated. Because long-short investing can hold portfolio risk steady while ownership of appreciated shares continues, it helps create the conditions for donating shares directly rather than selling and gifting cash, potentially eliminating the embedded capital gains on donated assets while funding meaningful impact. The same logic applies to shares earmarked for heirs, where continued ownership preserves the potential tax benefits for them. 

What Long-Short Investing Is Not 

Long-short investing is not a cure-all for stock concentration, and presenting it that way would do investors a disservice. Several considerations determine whether it belongs in a given plan: 

• Shorting carries its own risks. A short position loses value when its stock rises, and those losses are not capped the same way as losses on a long position. Borrowing costs, higher fees, and greater complexity are part of the strategy. 
• Results can diverge from the market. A long-short portfolio will not track a broad index, and periods of underperformance relative to a simple alternative should be expected. 
• The tax benefit is conditional. Tax benefits depend on the strategy actually generating harvestable losses, and on the investor having gains to offset. Neither is guaranteed. 
• Risk falls only if exposure falls. A long-short strategy can help offset some of the risk associated with a concentrated stock position, but it does not replace decisions about the stock itself. Concentration risk declines only to the extent the portfolio’s overall exposure to that stock is reduced. 
• Suitability varies. Long-short strategies that involve borrowing, short selling, or other more complex investment techniques are not appropriate for every investor, account type, or position size. 

Other tools may be a better fit, such as selling shares gradually, using exchange funds, implementing protective options strategies, establishing charitable trusts, or using tax-managed direct indexing. The initial planning process helps determine which tool, or combination of tools, is most appropriate. 

Closing Perspective 

Applied thoughtfully, long-short investing reframes stock concentration from an urgent problem into a planning variable: something to be managed deliberately over time, or unwound on the investor’s schedule, rather than dismantled reactively. Its value lies not in any single outcome, but in its flexibility. It can be used to emphasize risk reduction, return generation, or tax efficiency, with that emphasis shifting as an investor’s priorities change. Within a broader financial plan, it is one tool among many, chosen because it fits the situation. 

There can be no assurance that any particular investment objective will be realized or any investment strategy seeking to achieve such objective will be successful. Investing involves risk, including the possible loss of principal. 

All investment strategies carry risk, and transactions in options may carry a high degree of risk. Options derive their value from underlying equities or indices, and the derivative value is directly related to the underlying security, thus they carry many, if not more, of the same risks as the underlying equity or index. 

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