How to Choose a High-Yield Savings Account for Trading Cash

Say you keep 20,000 of trading cash parked for a year. At a hypothetical 0.50% APY it earns 100. At a hypothetical 4.00% APY it earns 800. Same money, same year, and the only thing that changed is where it sat.

That gap is the reason to shop. The account that earns the most is only useful if the money can reach your broker when you need it, sits under deposit insurance you have checked, and does not shrink through fees you missed.

What follows is how to compare them yourself. Savings rates change often, and any rate quoted today would be out of date before you read it, so every figure below is hypothetical and is there only to show the arithmetic.

Why keep trading cash outside the brokerage

Some traders keep a reserve away from the trading account on purpose. It is harder to spend on an impulse trade. It can earn more than the broker’s default cash option. And it sits at a bank, under the FDIC’s rules, separate from whatever happens at the broker, which some traders value as a second line of defense for money they could not afford to have tied up during an outage or an account dispute.

The cost is time.

When you sell stock, the proceeds settle under the SEC’s T+1 cycle. The settlement date page has the details. Only then can you withdraw them. An ordinary bank transfer back to the broker can take another business day or more, and some brokers hold newly deposited funds before you can trade with them, so money that leaves the trading account on a Monday may not be usable for a trade again until later in the week, and longer across a holiday.

Plan for that lag. Keep enough in the brokerage for the trades you actually expect to make.

APY and APR are different numbers

APR is the simple annual rate. APY is what you earn over a year once interest on interest is included, so for any account that compounds more than once a year the APY is the higher figure.

Deposit accounts are normally quoted in APY. Compare APY with APY. When an account quotes only a rate, ask for the APY.

Rates move

Most high-yield savings accounts pay a variable rate. The bank can lower it whenever it likes. Rates also tend to move after changes in the Federal Reserve’s policy rate. Today’s top payer may not stay there.

So look at the terms, and then at how the account has behaved. How much notice does the bank give? Does the rate differ for new and existing customers? Is there an introductory rate that drops after a few months?

What you earn also has to be weighed against rising prices. The page on inflation and your trading returns covers that side.

Fees, minimums and tiers

Read the fee schedule. Check for monthly maintenance fees, minimum balances to earn the advertised rate, fees for excess withdrawals and charges for outgoing wires, and look at whether the headline rate applies only on a balance band, with a lower rate paid on the rest. A hypothetical monthly fee of 5 is 60 a year. On a 2,000 balance, that is 3% gone.

Also check transfer limits. Many banks cap how much you can move out per day or per month, and some limit the number of certain withdrawals from savings, so find those caps in the account agreement before you need to move a large amount on short notice.

Deposit insurance, checked properly

The FDIC insures deposits up to 250,000 dollars per depositor, per insured bank, per ownership category, according to the FDIC. Individual accounts, joint accounts and certain retirement accounts are separate categories. Credit unions are covered by the NCUA, which provides equivalent coverage for share accounts.

Confirm the bank in FDIC BankFind before you deposit.

Savings apps need one more step. Many are technology companies that place your money at one or more partner banks. Deposit insurance covers you if one of those banks fails. It also depends on the partner bank’s records correctly showing the money as yours. It does not cover the failure of the app company itself. Find the name of the partner bank in the app’s disclosures, look it up in BankFind, and keep your own record of balances.

Compare it with your brokerage sweep

Most brokers put uninvested cash into a sweep. Some sweep to one or more program banks, where the cash can carry FDIC coverage at each bank within the limits. Others sweep to a money market fund, which is a security, carries no FDIC insurance and falls under SIPC’s protection against broker failure. What sweeps pay varies widely between brokers and between programs at the same broker.

Find your sweep terms on the broker’s disclosures page. If the sweep pays close to what a savings account would, the transfer lag may not be worth it. If it pays far less, a savings account, or a CD for money you will not need for a set term, can be worth the extra step.

Red flags

• A rate far above others with no clear explanation of the terms or how long it lasts.
• No named FDIC-insured bank in the app’s disclosures.
• A bank that does not appear in BankFind.
• Transfer limits you cannot find in writing.