American Express High Yield Savings (4.30% APY)

American Express National Bank (distinct from the card company, but same corporate parent) offers a straightforward HYSA at 4.30% APY with no minimum balance, no fees, and the institutional credibility of a $100+ billion bank. The account scores highest among competitors for the lowest rate-volatility: Amex has made fewer and smaller rate adjustments than competitors over the past 24 months, meaning the rate you see today is more likely to be the rate you have in 6 months. The interface is functional but dated versus newer fintech competitors. No ATM access and 1-3 day transfer times are standard limitations. FDIC insured. The ideal customer: someone who values predictability and brand recognition over chasing the absolute highest rate.