Moneywise and Yahoo Finance LLC may earn commission or revenue through links in the content below. If your retirement savings are invested in a broad index fund, Mark Cuban says you may be helping America's largest health insurers put profits ahead of patients. "If you own shares in a fund that owns any of the biggest insurance carriers, you are part of the cost of health care problem in this country," the billionaire entrepreneur wrote on X (1).
Jeff Bezos backs a platform that lets anyone invest in rental homes for as little as $100 — 6 ways to build wealth like a landlord without actually being one JPMorgan still sees gold hitting $5,000/oz by Q4 — and savvy investors are protecting their wealth with a tax-advantaged Gold IRA. Learn more with a free guide from Priority Gold The tax breaks in Trump's 'big beautiful bill' expire after 2028 — and experts say most people won't act in time. What to do before the window closes Cuban said those publicly traded insurance companies "put the share price over the health of you, your family, co-workers and friends." "Tell the funds you own that you will sell if they don't divest their interests in the biggest insurance companies," he continued.
"You can make a difference." Cuban added that 61% of Americans own stocks directly or indirectly, matching Gallup's 2023 reporting. The organization's latest available survey found that 62% of Americans owned stocks in 2025 (2), including shares held through funds and retirement accounts. One popular fund that includes insurance is Vanguard's Total Stock Market Index Fund, which comes as a mutual fund (VTSAX (3)) or ETF (VTI (4)).
Its March 2026 filing (5) showed positions in UnitedHealth Group, CVS Health, Cigna, Elevance Health, Humana and Centene. It held nearly $2 trillion in investments overall. The average annual premium for employer-sponsored family health coverage reached $26,993 in 2025 (6), according to KFF.
Workers contributed an annual average of $6,850 from their paychecks. Cuban argues that insurers contribute to those costs through their claims and payment practices. "They underpay, late pay, delay, deny," he wrote (7) to an X user, accusing insurers of taking back payments from doctors, misrepresenting contracts and preventing employers from properly reviewing claims.
"They hold on to your premiums as long as possible to earn interest," Cuban added, alleging that patients can be left waiting for cancer care. In 2022, the Department of Health and Human Services Office of the Inspector General reviewed denials from 15 of the largest Medicare Advantage insurers and found that 13% of denials of prior authorization requests (8) met Medicare's coverage rules. The agency said those services likely would have been approved under original Medicare.
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