  We introduce a non linear pricing model of individual stock returns that
defines a stickiness parameter of the returns. The pricing model resembles the
capital asset pricing model used in finance but has a non linear component
inspired from models of earth quake tectonic plate movements. The link to
tectonic plate movements happens, since price movements of a given stock index
is seen adding stress to its components of individual stock returns, in order
to follow the index. How closely individual stocks follow the indexs price
movements, can then be used to define their stickiness
