The most recent sale announcement came last week from the Argentine central bank, which said it had sold 124 metric tons.

And nearly all Argentine banks are restricting or eliminating borrower credit.

The Argentine central bank recently suspended five banks, giving them 30 days to regain liquidity or face closing.

"But so far the Argentine banks have weathered this crisis very well."

Currently, Argentine banks pay depositors about 2 percent daily interest.

Several major foreign banks and foreign-owned Argentine banks have said they may not be able to remain in business.

That forced the Argentine central bank to control its money supply to maintain that parity.

Credit Suisse has since written off the whole value of its 30-year-old investment in the Argentine bank.

Additionally, an estimated $3 billion of deposits has been withdrawn from Argentine banks.

In the last month, the Argentine central bank has spent about $1.2 billion in a futile effort to prop up the peso's value.