Optimism Bias Retirement Planning: Why ‘Save 15% and You’ll Be Fine’ Quietly Underfunds Most Households (2026)
Fidelity says a 65-year-old retiring in 2025 will spend about $172,500 on health care over the rest of their life — up more than 4%…
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Status Quo Bias Financial Decisions: One Case Study on the Six-Figure Cost of Doing Nothing (2026)
In 2016, a friend of mine started a new job and set her 401(k) contribution at 3% to grab the initial employer match. She meant…
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Gambler’s Fallacy Investing Mistakes: Why ‘The Market Is Due’ Quietly Wrecks Your Returns (2026)
The S&P 500 finished five straight quarters up. You reduce your monthly index-fund contribution because “we’re due for a pullback.” Or the opposite: a fund…
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Present Bias Retirement Contributions: A Step-by-Step System to Beat the Brain Trap Draining Your 401(k) (2026)
Nine out of ten Americans say they want to save more for retirement. Fewer than one in four actually raise their contribution rate in any…
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Availability Heuristic Personal Finance: The Vivid-News Trap That Quietly Distorts Your Money Decisions (2026)
In 2001, two economists ran a simple test on U.S. investors: how many of you think shark attacks kill more people each year than falling…
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Anchoring Bias When Buying a House: Why “Just Set a Max Budget” Fails (and What to Do Instead in 2026)
Imagine two buyers walk into the same open house. The list price is $429,300 — the U.S. median for existing homes in May 2026, per…
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Sunk Cost Fallacy in Personal Finance Decisions: A Real Case Study on Cutting Losses (2026)
In 1985, two Ohio University researchers ran an experiment that quietly explains a huge chunk of bad money moves. Ticket buyers who paid full price…
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Hedonic Adaptation and Lifestyle Inflation: Spend the Raise vs Save the Raise — The 2026 10-Year Math
The average U.S. worker who got a raise last year also spent more. In the Federal Reserve’s 2024 Economic Well-Being report, 32% of adults said…
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Endowment Effect Examples in Everyday Life: 6 Hidden Ways It Quietly Costs You Money (2026)
In a now-classic Cornell University experiment, students randomly given a $5 coffee mug refused to sell it for less than about $5.25. Students given nothing…
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Recency Bias in Investing: Why Last Year’s Winners Quietly Wreck the Average DIY Portfolio (2026)
Between 2003 and 2023, the average DIY equity fund investor earned about 8.01% a year. The funds they held earned 9.69%. That 1.68 percentage point…
