Prices are checked against each store and labelled with when.
It checks today's price at every store, compares the alternatives and answers in about a minute.
Stay Calm is a personal-finance book by David Booth, founder of Dimensional Fund Advisors and a pioneer of index and factor investing. It argues that stock picking and market timing lose to evidence-based, diversified, long-term investing, and it explains how market prices absorb information faster than any individual. It suits readers new to investing and DIY investors tired of prediction-driven advice. Against typical investing books, it leans on academic research and Booth's decades inside the industry rather than a personal trading system.
In stockReturn policy
Stay Calm is a guide to long-term investing by David Booth, founder of Dimensional Fund Advisors and one of the pioneers of index investing and a founder of factor investing. The book is based on the science of how markets work, not on predictions, hacks or market timing.
Booth has worked for more than 50 years in personal finance, alongside Nobel laureates Gene Fama, Merton Miller, Myron Scholes and Robert Merton. He shares the lessons, mindset and stories behind the shift from speculation to investing grounded in evidence, diversification and long-term thinking.
The book explains why picking stocks or predicting the market's next move is a losing game. It covers why market prices reflect information faster than any individual can, how to build a low-stress strategy with diversification, discipline and patience, and how to avoid emotional traps such as buying high and selling low. It also looks at uncertainty as a source of opportunity and at what "true wealth" means. The writing avoids jargon.
