Yo le pondría "apellido" a la naturaleza de los ataques.

The loans that the European Central Bank and the IMF made available to Greece momentarily, at least, stabilized European finances. The problem is speculators, such as hedge funds, could start a run on the debt of yet another country, such as Spain or Italy. (http://jeromekahn123.tripod.com/do/id8.html)

This crucial and historically contingent feature of EMU has allowed private bond market actors a far greater ability to undercut the policy and political autonomy of
Eurozone “sovereign” states than would be the case if the ECB were willing to aggressively block the speculative run on the debt of countries subject to ratings downgrades. (http://kellogg.nd.edu/odonnell/papers/fishman.pdf)

www.finanzas.com/.../sabe-como-funciona-ataque-1470129.html
23 Jul 2012 – ¿Sabe cómo funciona un ataque especulativo contra la deuda de un país? ... de que los gobiernos de determinados países puedan tener problemas para atender ... para resolver la crisis económica que afecta a la eurozona.