Best Direct Indexing Platforms for a Concentrated Stock Position

If one stock has grown into most of your portfolio, direct indexing on its own does not solve it. A standard direct indexing account buys an index with new money, and your problem is the position you already hold. The four routes that actually address a concentrated position are a tax-managed sale spread over years, a long-short extension account that manufactures losses to absorb the gain, an exchange fund that defers the gain entirely under IRC 721, and a covered call or collar program that reduces the risk without selling. Parametric's own Form ADV prices the extension account at 40 bps with a $1,000,000 minimum and its buy-write program at 65 bps with a $2,000,000 minimum. Frec Diversify starts at $100,000. Cache's exchange fund starts at $100,000 and charges 0.40% to 0.95%. Below roughly $100,000 of concentrated stock, none of these is worth the complexity and you should just work out what selling costs.

The word people search for is direct indexing, but the job to be done is unwinding a low-basis position without handing a third of it to the IRS. Those are different products with different minimums, and the difference matters more than any fee comparison. What follows is what each route costs, sourced where a source exists, and said plainly where the provider publishes nothing.

Everything here is educational. We build index construction and backtesting software. We do not manage money, sell any of these products, or give tax advice.

Why standard direct indexing does not fix a concentrated position

A normal direct indexing account holds the index as several hundred individual stocks so that losers can be harvested individually. That is genuinely valuable, and it is the whole argument laid out in direct indexing and tax loss harvesting. But it produces losses in proportion to the account's own size and volatility, and the losses arrive over years.

Run the arithmetic. A $500,000 direct indexing account might realize somewhere between $15,000 and $50,000 of harvestable losses in a normal year, depending on the strategy and the year. If you are sitting on $2,000,000 of employer stock with a $200,000 basis, the embedded gain is $1,800,000. At 23.8% federal that is roughly $428,000 before state tax. The harvesting engine is fighting a battle two orders of magnitude smaller than the problem.

This is why the providers built separately named products for it, and why those products have minimums an ordinary direct indexing account does not.

What is the best way to diversify a concentrated stock position?

There is no single best route. There are four, and which one fits depends almost entirely on the size of the position, how liquid you need to stay, and how long you are willing to wait. This table is the honest version.

Before comparing any of them, get the denominator right. Work out what an outright sale would actually cost you with our capital gains tax calculator, because every one of these products is sold against that number and the number is usually smaller than people assume. If your basis is 60% of market value rather than 10%, the tax drag is modest and the cheapest answer is often to sell across two tax years and be done.

How much does a long-short extension account cost?

This is the route that has genuinely changed in the last few years, because it came down-market. A long-short extension, sometimes marketed as a 130/30 or 140/40 strategy, holds the index long and shorts a slice of it. The short book throws off realized losses even when the market rises, and those losses offset the gains you realize as you sell down the concentrated position.

Two price points are published, at opposite ends of the market.

Read the financing cost as part of the price, not a footnote. Frec quotes 0.60% for a 140/40 Diversify strategy and then adds 0.23% of post-tax financing on top, so the real number is closer to 0.83%. Parametric's 40 bps looks cheaper, and at $1,000,000 it probably is, but Parametric's fee schedule opens with the line that its fees "are all negotiable and vary by investment strategy, product type, account size, customization requirements and required service levels", so the published number is a starting point rather than a price.

Frec's own published timeline table, which is refreshingly specific for this category, says that at a 50% cost basis a Diversify account takes one to five years to unwind the position, against immediate for a sale and seven years for an exchange fund, and that Diversify carries no lock-ups. That is the strongest argument for the extension route: you keep your money accessible the whole time.

Is an exchange fund better than direct indexing for concentrated stock?

An exchange fund is not better or worse, it is a different trade. You contribute your appreciated shares to a partnership alongside other investors doing the same thing, and under IRC 721 the contribution is not a taxable event. Your original basis carries over to your partnership interest, so nothing is forgiven, only deferred. Cache states the mechanism plainly: "Contributions to an exchange fund aren't taxable under IRC 721. Your full pre-tax value stays invested and compounding."

The costs are structural rather than just financial. Every exchange fund must hold at least 20% of its assets in illiquid assets, in practice private real estate, which is a legal requirement and not a strategy choice. The seven-year holding period is real: withdraw earlier and you receive the lesser of current market value or your pro rata share. And because the funds are built from what wealthy people actually hold, they skew heavily to technology, with analysis at Kitces putting a typical fund near 60% technology against roughly a third for the S&P 500. You may be swapping one concentration for a slightly broader one.

Pricing has moved here too. Cache publishes 0.40% to 0.95% with a $100,000 minimum, which is well below the 0.70% to 2.00% Frec cites as typical for the category, and far below the $500,000 to $1,000,000 minimums the traditional providers ask. Note that neither Eaton Vance nor Goldman Sachs publishes a fee or a minimum for their exchange funds anywhere public, so treat any specific number you see quoted for them as unverified. We work through the full comparison in exchange funds and side by side in Frec Diversify versus the Cache exchange fund.

The eligibility gate rules most people out before fees matter. Exchange funds are sold to accredited investors and, in most cases, qualified purchasers, which the SEC defines as holding at least $5,000,000 in investments. If you do not clear that bar, the extension account is your route.

What do the SMA managers charge for a tax-managed transition?

The classic institutional answer is to hand the position to a separately managed account manager who sells it down gradually inside a tax-managed index portfolio, harvesting losses along the way to absorb the gains. The fee schedules for these are not on the marketing pages. They are in Form ADV Part 2A filings at the SEC, which is where the figures below come from.

Two things in that table are worth pausing on. Parametric's Custom Portfolio Management at 23 bps is the cheapest published SMA fee in the category and almost nobody quotes it, because it sits three pages into a filing. And the call-writing programs are described in Parametric's own words as "managed call writing programs for investors who hold concentrated stock positions", which is the only place a major manager states in a regulatory filing that this is what the product is for.

The catch with the SMA route is that it is an adviser channel. You generally reach these managers through a financial adviser or a wrap program, and the platform fee sits on top. Morgan Stanley's Select UMA documents disclose a maximum 2.0% annual advisory fee plus an SMA manager fee of 0% to 0.75% a year. A 35 bps manager can arrive as a 2.0% product. Our page on direct indexing fees shows how wide that spread gets, and the adviser-facing comparison covers who to approach.

Should I just borrow against the position instead?

Sometimes, and it is underrated. If the reason you want to sell is that you need cash rather than that you are worried about the concentration, a securities-backed line of credit raises the money without realizing anything. No sale means no gain, no tax, and no reset of your holding period. Frec lends up to 70% of portfolio value, though initial availability is typically nearer 50% and rises as the portfolio appreciates. We compare the published rates in borrowing against a direct indexing portfolio.

What borrowing does not do is reduce your risk. You still own the same single stock, and now you owe money against it, which is exactly the wrong shape if the concern was concentration in the first place. Use it for liquidity, not for diversification.

How much of one stock is too much?

There is no threshold in the tax code, so this is a judgment call rather than a rule. The commonly cited planning heuristic is that a single position above 10% to 20% of liquid net worth starts to dominate outcomes, and above roughly 25% the portfolio is effectively a bet on one company regardless of what else you own. We work through the reasoning in how much of your portfolio should be in one stock.

What is worth doing before you commit to a multi-year unwind is being honest about the position itself rather than only about the percentage. The whole cost stack above, from 23 bps to 2%, is money spent on the assumption that your concentrated holding is a worse bet than the index. That is usually true, and diversification is the right default, but it deserves a real look rather than an assumption. Pulling a structured research card on the specific company, with the fundamentals and the risk factors laid out, is a cheaper first step than a seven-year lock-up and it sometimes changes how quickly you want to move.

Which route fits which size

The size of the position rules most of these in or out before anything else does.

One more piece of arithmetic to run before you sign anything. If the product costs 0.85% a year on $1,000,000 and takes five years, that is roughly $42,500 in fees to avoid a tax bill that the calculator may tell you is $200,000. That is a good trade. If the position is $150,000 with a 60% basis, the same product costs real money to save perhaps $14,000, which is not. The fee is fixed and visible; the tax saving depends entirely on your basis, and almost every provider's marketing assumes a lower basis than most people actually have.

The short version

Direct indexing by itself is a good way to build a new taxable portfolio and a poor way to unwind an old concentrated one. If you hold $100,000 to $1,000,000 of one stock and want to stay liquid, a long-short extension account like Frec Diversify is the most flexible route and its no-lock-up structure is a genuine advantage over an exchange fund. If you clear the qualified purchaser bar and can accept seven years of illiquidity, an exchange fund at 0.40% to 0.95% defers the entire gain today. Above $250,000 with an adviser, the SMA managers will run a tax-managed transition at 23 to 40 bps, provided the platform fee on top stays honest. And if the position is small or your basis is high, the cheapest answer is still the oldest one: sell it, pay the tax, and move on. Work out that number first, because it is the benchmark every other option is measured against.