contagion effect: the tendency of a financial crisis to spread and "infect" other nations.
The "Contagion Effect" reminds me of supply chains in exports between countries. Because a country exports an intermediate good to another, if there is a disruption that effects the export of the country, the other ends up having disruptions in their distribution/production. This shows that when a country becomes a free financial market and starts working with other international markets, they need to be aware that any economic or even political issues within the other country could likely affect their economy.