Notions 17
and Rigobon do not take into account the fact that the volatility of the “target”
market may change both for reasons associated with the “source” and for idiosyn-
cratic reasons. They propose a new method to identify contagion and conclude that
contagion phenomena–during the Asian nancial crisis of 1997–1998, between
industries in the US stock market in 2007–2008 or in the European sovereign CDS
market in 2008–2013–may be hidden by the Forbes- Rigobon adjustment.
1.5 Moral hazard and too big to fail
Just as adverse selection (1.2), moral hazard results from information asymmetries
in the principal- agent relationship, i.e. a relationship in which the action of an
agent, called the “principal”, depends on the action of another ...