ETFs can improve scalability, tax efficiency, and operations — but not every SMA strategy qualifies
Should you turn your SMA book into an ETF?
To qualify, no single company or issuer can represent more than 25% of the fund. The five largest holdings, combined, must remain below 50%.
These diversification requirements are the first regulatory test for an ETF conversion.
Your portfolio information never leaves your browser — nothing is uploaded, transmitted, or stored. Account-level analysis on custodian data is with the desk.
How an SMA becomes an ETF
Section 351 says that if you contribute property to a corporation and the contributors control it afterwards, you don't recognize gain on the contribution. Pointed at an exchange-traded fund, that one sentence is the entire product. Your clients' appreciated positions go in, fund shares come out, and the tax on the built-in gain is not paid this year.
Section 351(e) is the sentence that takes it back. If the corporation is an investment company, nonrecognition doesn't apply — unless the portfolio going in is diversified. “Diversified” has a statutory definition, and the definition is arithmetic: no more than 25% of the value in the securities of any one issuer, and no more than 50% in five or fewer issuers.
That is the whole mechanism.
Deferral is not elimination. Nothing here avoids tax. It changes when the tax is paid — and who is holding the position when it comes due.
But why an ETF?
Taxes, first. An ETF redeems in kind — appreciated positions can leave the fund in redemption baskets without the fund recognizing gain — so the embedded gain that came in can be worked down over time rather than distributed to shareholders as taxable capital gains. Paired with tax-lot management inside the fund, that is the second half of the tax case: §351 defers gain on the way in, and the ETF's in-kind mechanics manage it once it is inside.
Then the operational case. One fund replaces many separately managed accounts: the strategy is implemented once, rebalances execute once, and new assets come in without rebuilding the portfolio client by client. That is the scalability and the operational simplicity the wrapper is known for — and it is also a different job than running accounts. Whether you want that job is the next question.
Everything below this line is us being straight about who that arithmetic serves, who it doesn't, and what it asks of the people it does.
Who this serves — and who it doesn't
Most of what a conversion desk sells is enthusiasm. We would rather route you well: three kinds of book where a conversion is the wrong tool — each with its better path — and one cost that everybody underweights.
Retirement-heavyIf most of the book sits in IRAs and 401(k)s there is no embedded gain to defer, because there was never a taxable gain to begin with. The right move is to launch the fund the ordinary way — or pick one — and let those accounts buy it with cash. Rotating retirement money costs those clients nothing in tax, and it costs us a conversion — which is the arithmetic of an honest answer.
One position dominates an accountThe 25/50 test binds on each contributing account, not on the fund and not on your model. If a client holds 40% of their account in a single stock, pooling with other clients does not rescue them — they fail on their own numbers. That account needs structuring first: carve the position out, contribute part of it up to the line, or broaden what that client contributes. And either way, one client's concentration does not sideline the rest of the book.
The embedded gain is thinA conversion carries real friction: legal, custodial, seasoning, and the standing cost of running a fund. Below a certain amount of unrealized gain the friction eats the deferral and you have bought yourself a fund you didn't need. Deferring a small gain is not a strategy. It is an expense.
And the cost nobody prices: on the far side of a conversion you are an asset manager. There is a fund to oversee, likely a board seat, an ADV to update, and a set of obligations that do not go back in the box if the strategy disappoints. Some advisers want exactly that. Others discover they wanted the tax outcome and not the job.
Settle it in thirty seconds
You can get most of the way to an answer without pasting a single holding. These are the five things the desk would ask on a first call — and depending on your answers, the right next conversation isn't always the one this page is named after. The routing below says which one it is.
The first three answers route you; the last two sharpen the recommendation.
What a model can tell you
A model is the right first screen: it tests the strategy you actually run, in seconds, without touching a single client record. What a model cannot be is a transferor. The statute tests each account contributing to the fund, on its own holdings, on the day it contributes — and real accounts drift away from the template, through legacy positions, tax lots nobody wanted to touch, client restrictions, and a decade of partial rebalances.
So what follows is a screen, not a determination — and read that way, it is decisive in one direction. If a model fails here, the accounts following it will fail worse. If a model passes with thin headroom, expect a meaningful share of accounts to sit on the wrong side of the line. That scatter is the entire content of account-level testing, and no browser tool can do it for you, because the data it needs isn't yours to paste.
Test your book
One position per line — ticker, market value, cost basis. Basis is optional; without it there is no gain to rank on. The spheres at right populate as you type — there is no submit button and nothing to send.
Add a second model — or load the sample RIA above — to rank and pool them.
Paste holdings — spheres populate as you type, sized by weight.
Paste holdings and the verdict resolves as you type. There is no submit button and nothing to send.
What this page can't tell you
Whether any specific client can contribute. Whether their lots behave. Whether the issuer-attribution rules collapse two of your holdings into one. Whether the fund clears RIC diversification afterwards, which is a separate test with separate arithmetic. Whether the contributors will hold 80% of the fund at close. Every verdict on this page is a preliminary screen; the final determination requires tax counsel working from complete account records.
Booking opens the desk panel. Nothing you entered on this page is shared with it unless you tick the box there.