What two key factors trigger speculative attacks leading to currency cries in emerging market countries?

What will be an ideal response?

The deterioration in bank balance sheets and severe fiscal imbalances are the key factors. To counter a speculative attack, a country might try to raise interest rates. Raising interest rates, however, would worsen the problem of banks that are already in trouble. Speculators recognize this and seize the opportunity. When their are severe fiscal imbalances, there is concern that government debt will not be paid back. Funds are pulled out of the country and domestic currency is sold leading to a decline in the value of the domestic currency. Speculators will once again seize the opportunity.