A martingale is an item of tack used to control the horse’s head and neck position. It attaches to the girth and bridle to apply pressure should the horse’s head become too elevated.

Greenwood, Robin, and Luis M. Viceira. "Martingale Asset Management LP in 2008, 130/30 Funds, and a Low-Volatility Strategy (TN)." Harvard Business School Teaching Note 211-079, January 2011. (Revised ...

Martingale Asset Management L P trimmed its holdings in Microsoft Co. (NASDAQ:MSFT – Free Report) by 12.1% in the third ...