The Intelligent Investor's key lesson is

Anchoring effect

Anchoring bias skews sell decisions based on initial purchase price

Recency bias

Recency bias overvalues recent events in decision-making

List of Call the Midwife episodes

Older financial institutions likely to survive longer

Capital asset pricing model

Treynor-Black model combines active stock picking with a passive market portfolio

Mental accounting

Mental accounting influences spending and saving decisions

Overconfidence effect

Overconfidence leads to overtrading and underperformance