Greek debt talks weigh on currency, which hits 11-year low against yen.

Bonds of highly rated European nations see record volatility.

Bonds of highly rated European nations see record volatility.

Nation exceeds yield that led to bailouts in Greece, Ireland.

Nation exceeds yield that led to bailouts in Greece, Ireland.

Bondholders could lose up to 60% of their investments.

Bondholders could lose up to 60% of their investments.

Other central banks may try to weaken their currencies to bolster exports.