Dhaene, Jan; Linders, Daniël; Schoutens, Wim; Vyncke, David - In: Insurance: Mathematics and Economics 50 (2012) 3, pp. 357-370
We introduce a new and easy-to-calculate measure for the expected degree of herd behavior or co-movement between stock prices. This forward looking measure is model-independent and based on observed option data. It is baptized the Herd Behavior Index (HIX).