  Recently, an indicator for stock market fragility and crash size in terms of
the Ollivier-Ricci curvature has been proposed. We study analytical and
empirical properties of such indicator, test its elasticity with respect to
different parameters and provide heuristics for the parameters involved. We
show when and how the indicator accurately describes a financial crisis. We
also propose an alternate method for calculating the indicator using a specific
sub-graph with special curvature properties.
