values of $s$ specify the market informational connectivity, which conditions the degree of coherent multiplicative behavior. Models in the literature typically set $s\geq 0$, meaning that the effective amplitude of fluctuations increases with $x$. Negative $s$ makes multiplicative fluctuations grow with decreasing $x$, thus it mainly reflects a cooperative reaction to quiescence. Although it does not seem to reflect a realistic steady state of the market, it may occur as a transient, driven by speculative trading.

The two mechanisms are complementary. If $r<0$ the restoring force decreases for increasing $x$ above the reference level, in particular, for $r<-1$, the force tends to zero in the limit of large $x$. Thus, decreasing $r$ represents markets that, become less able to recover the reference level by means of the deterministic tendency alone. However, a strong multiplicative response to large fluctuations (positive $s$) could still compensate that inability and restore the market historical level. Concerning the response to small values, the restoring force diverges at the origin if $r<1$, while for $r>1$, it vanishes at $x=0$, meaning that this point becomes an unstable equilibrium state. This corresponds to a market indifferent to low levels of trading activity. Again, this effect can be balanced 