Pre-Graham manual on speculation, margin and the psychology of markets
Carret founded the Pioneer Fund in 1928 and ran money for over sixty years, and this 1930 book states his approach to what he called speculation, meaning the purchase of securities in the expectation of profit from a change in their value rather than from income alone.
His definitional position is unusual and worth noting. Carret argues that the distinction between investment and speculation is less useful than commonly held, since any purchase involves a judgment about the future, and that the honest speculator who analyses a business is doing something more defensible than the investor who buys a bond without examining the issuer.
His twelve commandments of speculation are the most cited part. They include holding at least ten different securities covering at least five different fields of business; reviewing every holding at least once every six months; keeping at least half of total funds in income-producing securities; considering yield the least important factor in analysing any stock; being quick to take losses and slow to take profits; never putting more than a quarter of funds into securities about which detailed information is not readily available; avoiding inside information as one would avoid the plague; seeking facts diligently and advice never; ignoring mechanical formulas for valuing securities; avoiding buying during a bull market's peak enthusiasm; borrowing money sparingly and only when the market is depressed and rates are low; and setting aside a moderate proportion of funds for long-term options on promising companies.
The reference has verified the framework and the commandments rather than the detail of every chapter. The market conditions and instruments described are from before 1930. The commandments have held up remarkably well.
Investors who want a set of durable operating rules from a practitioner whose career spanned more than sixty years.
Founded the Pioneer Fund in 1928 and ran money for seven decades through Carret & Company; died in 1998, aged 101.
The Art of Speculation, published in 1930, made the case for buying securities on appraised value with a margin of safety two years before Graham and Dodd's Security Analysis, which places it at the start of the value tradition rather than downstream of it. A Money Mind at Ninety records the holding periods, position sizing and management assessments behind a record spanning the Depression and the post-war decades.
Chosen by shared topics, the entries that hold them, and the people who recommended both.

