European and other international banks had acquired a lot of dollar-denominated assets which they habitually funded in the interbank market; as the market dried up, they were forced to buy dollars.
Los bancos europeos y otros bancos internacionales habían adquirido muchos activos denominados en dólares que habitualmente situaban en el mercado interbancario; a medida que el mercado se contrajo, se vieron obligados a comprar dólares.