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Bank & Fintech Arbitrage

HYSA + MMF Rotation — Chase Top APY Continuously

Rotate cash across the top 3–5 HYSAs/MMFs every 3–6 months as promo rates change — pickup 30–150 bp/yr.

Overview

High-Yield Savings and money-market fund rates change weekly. Systematic rotation: (1) hold core emergency fund at a stable-top HYSA (Ally, Marcus, Wealthfront, Discover), (2) monitor top rates via Bankrate / DoctorOfCredit, (3) when a competitor beats current by 50+ bp for 90+ days, move balance via ACH ($100K limit typical). Money-market funds (VMFXX 5.28%, SPRXX 5.03%, VUSXX for state-tax-exempt) often beat HYSAs. Watch bonus rate 'teasers' that revert.

Best fit
$50K+ liquid savings holdersRate-conscious retirees / entrepreneursCorporate treasury
Estimated impact
$300–$1,500/yr per $100K rotated

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