In the last 200 years, there have been more than 250 cases of sovereign-debt default, and 68 cases of domestic-debt default. None of these was an isolated incident. Indeed, such defaults – combined with factors like large current-account or fiscal deficits, overvalued currencies, high public-sector debt, and insufficient foreign-exchange reserves – have always triggered financial crises, from the Mexican peso crisis in 1994 to the Russian ruble crisis in 1998 to the American subprime mortgage crisis in 2008.

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