Schwab and Fidelity tighten the door on the $150 billion tax trade

The trade that wealthy investors poured roughly $150 billion into over three years, by some estimates, is meeting its first serious check. Writing in Financial Advisor Magazine, Charlie Wells, Loukia Gyftopoulou and Paige Smith report that Charles Schwab and Fidelity Investments — the two major custodians behind tax-aware long-short accounts — have both tightened the door, one with new rules, the other with a near-total freeze.

At Schwab, the warning signs accumulated in the firm's Westlake, Texas headquarters. The company entered the business only last year, and by the second quarter it was generating roughly $70 million in revenue from the strategy, per the report. Executives worried the growth could get out of hand quickly; if the trade turned, Schwab would be on the hook, or in the middle of a market shock.

Sheila Bair, the former FDIC chair who helped clean up after the 2008 crisis, did not sugarcoat the product. "There's no other reason to do it than avoid paying taxes," she said. "There's risk for the firms offering this."

Schwab's answer came in two rounds. In April and again in June, it tightened who could open these accounts: the share of an adviser's total assets that could sit in them, the minimum starting amount, the borrowing allowed, the margin required. The firm also said it would issue margin calls and contact advisers whose accounts crossed the new thresholds. Those changes served to push at least some business away, the report says.

By the end of June, the strategy was contributing about 1% of Schwab's overall revenue, a small yet stunning sum given it had broken into the business only a year earlier. In a matter of months, Schwab had become one of the two major custodians facilitating tens of thousands of these accounts.

Fidelity moved harder. The largest U.S. brokerage, with almost $20 trillion under administration, set up the first such account years ago and, according to the report, was for a time the only firm offering it. Now it has stopped accepting new clients indefinitely and raised fees on some existing ones. The pioneer became the gatekeeper.

The revenue math makes the clampdown easy to dismiss. One percent of Schwab's revenue is a rounding error on a balance sheet that size. But a business line that small doesn't usually earn two rounds of rule changes in a single quarter. The fact that it did suggests the worry was about the shape of the exposure, not the size of the check. Tax-aware long-short accounts couple a tax motive with borrowed money; that combination concentrates risk in ways plain asset management doesn't.

For an RIA, the first job is a client-by-client review. Schwab's cap applies to an adviser's total assets, not just a single account. That converts a tax strategy into a book-level concentration question. An adviser with many wealthy clients in these accounts must know how close each one sits to the line, what the margin schedule demands, and what happens when the line moves again.

Margin is the part clients rarely hear about. Long-short accounts carry leverage, which means a mark-to-market obligation. In a downturn, the account sold as a way to protect after-tax wealth becomes the one asking for cash. Advisers who described the product as a conservative shelter need to update the description.

Fidelity's fee increase lands on the other side of the relationship. Some existing clients will pay more, and new clients cannot get in at all. An adviser whose practice leans on this product now has to explain both facts to the next prospect. The Fidelity pitch has changed; the Schwab pitch now includes thresholds and callable margin.

What replaces the strategy is not yet clear. The report does not name a custodian eager to pick up the flow, and it does not suggest the strategy itself has failed. What is clear is that demand will not quietly disappear: the tax motive is unchanged, and wealthy clients rarely accept a larger bill without searching for an alternative. Advisers who have a response ready before the client asks will have an easier conversation than those who wait for the custodian's call.

Schwab and Fidelity have effectively put a price on the risk they were holding. The next custodian to look at that flow will price it too, and the clients will be watching. The tax bill didn't go away; it just moved.