Weak-form efficiency is a pricing theory that the price of a security reflects the past price and trading history of the security. Theory implies that security prices follow a random walk. Related: Semistrong-form efficiency, strong-form efficiency.
Barry Goldsmith
| APA | Barry Goldsmith. (2010). Weak-form efficiency. Retrieved September 25, 2026, from http://smartdefine.org/weak-form_efficiency/definitions/1166427 |
| Chicago | Barry Goldsmith. 2010. "Weak-form efficiency" http://smartdefine.org/weak-form_efficiency/definitions/1166427 (accessed September 25, 2026). |
| Harvard | Barry Goldsmith 2010, Weak-form efficiency, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/weak-form_efficiency/definitions/1166427>. |
| MLA | Barry Goldsmith. "Weak-form efficiency" 21 October 2010. Web. 25 September 2026. <http://smartdefine.org/weak-form_efficiency/definitions/1166427> |