Treynor

Treynor is a name used for a geographic location, a surname, and a concept in investment management. It refers most notably to a small city in the western part of Iowa, United States, as well as to a financial performance measure named after a American economist.

Treynor, Iowa, is a city in Pottawattamie County in western Iowa. It is a small rural community with an economy centered on agriculture and local services. The city’s name is part of the regional patchwork of small towns in the Midwest.

As a surname, Treynor has been borne by various individuals. In the field of finance, Jack Treynor, an American economist, is associated with the Treynor ratio, a measure of risk-adjusted performance.

The Treynor ratio is defined as the excess return of a portfolio over the risk-free rate divided by the portfolio’s beta. It emphasizes systematic risk when evaluating performance and is commonly used alongside other metrics such as the Sharpe ratio and the information ratio.