September 26, 2026

USA

UnitedHealth unter der Lupe: 50.000 Seiten interne Dokumente, Medicare-Codes und die Milliardenfrage hinter dem Geschäftsmodell

Ein Senatsbericht basiert auf 50.000 Seiten interner UnitedHealth-Unterlagen. Ein neuer OIG-Audit schätzt 46,9 Mio. Dollar Überzahlungen bei einer Tochter. Was steckt hinter dem Risk-Adjustment-Geschäft – und was bedeutet es für.

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Super Micro Computer unter Druck: SEC-Ermittlungen, Exportkontrollen und die offenen Fragen hinter dem KI-Boom

Super Micro wächst im KI-Boom rasant. Gleichzeitig laufen SEC-Anfragen, ein Exportkontrollverfahren gegen drei mit dem Unternehmen verbundene Personen und eine offene Material Weakness. Was die Dokumente wirklich zeigen.

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Intrinsic Value Explained: DCF, Margin of Safety, Valuation Ranges and Why One Number Is a Trap

Intrinsic value explained with DCF, free cash flow, discount rates, margin of safety, valuation ranges, multiples, asset-based methods and common valuation traps.

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Market Capitalization Explained: Formula, Examples, Market Cap vs. Enterprise Value and the Share-Price Trap

Market capitalization explained with the formula, examples, market cap vs. enterprise value, index weighting, dilution, buybacks and why share price alone tells you almost nothing.

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Bond Yield Explained: Coupon Rate, Current Yield, Yield to Maturity and Price Risk

Understand bond yield with a complete worked example: coupon rate, current yield, yield to maturity, price changes, reinvestment, duration and credit risk.

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ETF vs. Index Fund: Key Differences, Costs and How to Choose

Understand ETF vs index fund: compare wrappers, trading, spreads, fees, automation and tax treatment, with worked examples and a practical fund checklist.

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Dollar-Cost Averaging Explained: Examples, Lump-Sum Comparison and the Cost of Waiting

Learn how dollar-cost averaging works with three worked examples. Compare lump-sum investing, average cost, cash drag, fees and practical purchase schedules.

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Portfolio Rebalancing Explained: When to Rebalance, Thresholds, Taxes and the Cost of Doing It Wrong

Portfolio rebalancing explained: calendar vs threshold rules, drift bands, taxes, transaction costs, cash-flow rebalancing, retirement portfolios and common mistakes.

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Sortino Ratio Explained: Formula, Downside Deviation, Sharpe Comparison and Hidden Traps

Sortino ratio explained with the formula, downside deviation, minimum acceptable return, worked examples, Sortino vs Sharpe, annualization and common mistakes.

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Modern Portfolio Theory Explained: Efficient Frontier, Diversification and Why Optimization Fails

Modern Portfolio Theory explained with the efficient frontier, mean-variance optimization, correlation, diversification, minimum variance and practical portfolio limits.

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