Your brokerage's "cash sweep" may be paying you almost nothing. Here's how to check

Open almost any brokerage account and there's a balance sitting in cash — waiting to be invested, or just parked between trades. Firms don't let that cash sit idle; they automatically move it into a "cash sweep" vehicle. What that vehicle pays you varies enormously by firm, and in some cases regulators have found the gap wasn't just market variation — it was a process failure that cost clients real money.

What the SEC actually found

In January 2025, the SEC announced settled charges against Wells Fargo Clearing Services, Wells Fargo Advisors Financial Network, and Merrill Lynch, totaling $60 million in civil penalties ($28 million and $7 million for the two Wells Fargo entities, $25 million for Merrill Lynch). The SEC's finding wasn't that the firms' sweep rates were too low in some abstract sense — it was that the firms failed to adopt and implement policies reasonably designed to ensure their advisory clients' cash sweep arrangements were selected and monitored in clients' best interest, as required under the Investment Advisers Act.

In plain terms: the firms set the rules for how clients' idle cash got swept, collected the economic benefit of the spread, and didn't have adequate guardrails making sure that arrangement was actually working for the client on the other end.

What a "cash sweep" is, in the SEC's own words

The SEC's Investor Bulletin on cash sweep programs lays out the three main options firms use for uninvested cash:

1. Bank deposit sweep programs — cash moves into a deposit account at one or more banks, which may or may not be affiliated with your investment firm. These are FDIC-insured up to $250,000 per customer, per bank, but the bulletin notes they "often pay less interest than money market fund sweep programs."
2. Money market fund sweeps — cash moves into a money market fund investing in short-term, high-quality debt like Treasury bills. These aren't bank deposits, so FDIC insurance doesn't apply; they're typically covered by SIPC instead, up to $500,000 per customer (including a $250,000 cash-claims limit).
3. Free credit balances — cash simply stays at the firm, which may or may not pay interest on it at all.

The bulletin's core advice is direct: compare the rate your sweep program pays against other options, both inside and outside your investment firm, because earnings "can vary significantly."

The gap, in real numbers

"Can vary significantly" understates it once you look at two firms' own published rates side by side.

Wells Fargo Advisors' own published rate table for its Bank Deposit Sweep Program (checked July 2026) shows tiered rates starting at 0.02% APY for household assets under $1 million, rising only to 0.20% APY at $20 million and up. Fidelity, by contrast, defaults new brokerage accounts into a government money market fund (SPAXX) as the core sweep position, which Fidelity's own site lists at a 3.30% 7-day yield as of July 1, 2026.

That's not a apples-to-apples comparison of two identical products — a bank deposit sweep and a money market fund carry different protections, discussed above, and rates move. But it illustrates exactly the gap the SEC's action was about: a bank sweep default can sit more than three percentage points below a money-market alternative, on the same idle cash, at the same kind of firm.

Why this happens

The mechanism is straightforward and not inherently improper: firms that offer bank deposit sweeps typically have an arrangement with the receiving bank (sometimes an affiliate) where the bank pays the brokerage a fee tied to how much client cash sits there. The lower the rate paid to the client, the wider the spread the firm and bank can share. That's a normal business arrangement — the SEC's action wasn't against the existence of that arrangement, but against firms not having a real process to make sure the client's side of it stayed reasonable.

How to check your own account

1. Find your current sweep rate. It's on your account statement, or on your firm's website — every major brokerage publishes a cash sweep rate page.
2. Find the alternative at the same firm. Most firms that default to a low-rate bank sweep also offer a money market fund option; check its current yield on the same site.
3. Do the math on your actual balance. A gap of a few percentage points on $5,000 sitting idle is a rounding error; on $150,000 sitting idle for months, it's real money.
4. Understand what you'd be trading. A bank sweep gives you FDIC coverage up to $250,000 per bank; a money market fund gives you SIPC coverage on a different basis and isn't federally insured the same way. Neither is universally "better" — it depends on what you need that cash to do.
5. Ask, if you have an advisor. If your account is advisory (not self-directed), your advisor has an obligation to consider your interests in how that cash is managed — that's precisely what the SEC's action was about.

What this isn't

This is a description of a public SEC enforcement action, an SEC Investor Bulletin, and two firms' own published rate disclosures — not investment advice, and not a recommendation to use or avoid any specific brokerage, sweep option, or fund. ClearValue Money isn't a registered investment adviser or broker-dealer. Rates change; check your own firm's current, dated disclosure before acting on any figure here.

Where this fits

This is the same mechanism-over-marketing standard we apply to how money sites make money: the arrangement itself usually isn't the problem, the lack of visibility into it is. A cash sweep program is just another place where a company earns a spread on money passing through its hands — the fix isn't outrage, it's checking the actual number on your own statement against the actual alternative at your own firm. It's the same instinct behind checking who's actually licensed before taking investing advice: verify the specific number or credential yourself, on the primary source, rather than assuming the default is the best available option.