Choosing a Broker (US)

The parts that are the same everywhere (and why)

Three equalizers define the modern US landscape.

Zero commissions. Since the industry-wide move in 2019, standard online ETF and stock trades cost $0 at essentially every major broker. Commissions are no longer a selection criterion; anyone charging them for plain ETF orders is answering a question you didn't ask.

Universal shelf. US-listed ETFs trade on national exchanges, and every mainstream broker gives access to all of them. There is no "this broker has better funds" in the US ETF world (mutual funds differ; ETFs don't).

SIPC protection. Brokerage customers are covered by SIPC up to $500,000 in securities ($250,000 cash) if the broker fails, and, as Chapter 1 established, your fund shares are your property regardless: custody, not the broker's balance sheet, holds them. Broker failure is an inconvenience risk, not a portfolio-loss risk, at every regulated firm.

The parts that actually differ

1. Account types and their quality. The largest financial decision a US saver makes is not which broker but which wrapper: 401(k) at work, then IRA/Roth IRA, then taxable (Chapter 28 orders these properly). Brokers differ in how well they handle IRAs (fees, ease of contributions and rollovers), whether they offer HSAs, custodial and 529 accounts, and how painless backdoor-Roth mechanics are if you'll ever need them. This is the highest-weight criterion on the list.

2. Cash treatment. Idle cash is where zero-commission brokers quietly earn. Some sweep your cash into money-market funds yielding close to market rates; others park it at fractions of a percent and keep the difference. On a five-figure cash balance, this dwarfs every fee you'll never pay. Check the default sweep rate and whether a high-yield sweep is one click or a monthly chore.

3. Fractional shares and automation. Fractional dealing lets you invest exact dollar amounts ("$500 into VTI") rather than whole shares, and recurring-investment features plus DRIP (automatic dividend reinvestment) turn a plan into a habit (the American cousin of Europe's savings plans, Chapter 16). If you intend to automate, and this book thinks you should, confirm the broker supports recurring buys into ETFs specifically, not only mutual funds.

4. Order handling and PFOF, honestly. Most retail brokers are paid by market makers to route orders to them (payment for order flow). The honest summary of the evidence: execution quality for small ETF orders is generally good across the industry, PFOF's costs are measured in fractions of a cent per share, and regulators require execution-quality reporting; meanwhile the practice funds the zero-commission model. It is a legitimate thing to dislike and a poor reason, alone, to pick a broker. What matters more for you: whether the platform defaults you into limit orders and shows quotes clearly (Chapter 15).

5. The interface's incentives. Some apps are built like filing cabinets, some like casinos: confetti, streaks, options prompts, margin nudges. The evidence in Chapter 61 is blunt about what engagement-optimized interfaces do to investor returns. A boring app is a feature. Take the tour with one question: does this design make it easier to do nothing?

Small print worth two minutes

• Transfer-out (ACAT) fees: commonly ~$50–100; some brokers reimburse incoming transfers. Not a reason to stay anywhere.
• Options and margin: ignore both as a beginner; their absence from your life is a return strategy (Chapters 72 and 78 cover the products for later).
• Statements and tax documents: clean 1099s and cost-basis handling matter more than any app feature the first time you file.
• Settlement is T+1 in the US: sale proceeds are available the next business day.

A worked example

Maya, 28, wants a Roth IRA plus a taxable account, investing $400 monthly into a total-market ETF.

Her comparison came down to two firms. Broker A: recurring fractional ETF buys, one-click DRIP, cash sweep near money-market rates, dull interface. Broker B: identical costs, prettier app with a "top movers" home screen, cash sweep at 0.2%, recurring buys for mutual funds only.

She chose A. The visible differences were worth real money (the sweep spread alone: ~$150/year per $10,000 of average cash) and the invisible one was worth more: on Broker A her plan runs untouched; on Broker B every login was an invitation to fiddle. Ten years of $400 months at 7% is ~$69,000; the broker's job is to make that arithmetic boring, and boring was on the menu.