He also said the local currency was trading too low when it hit 55.70 to the dollar on Monday, hovering dangerously close to its all-time trough of 55.75 to $1.
At the Philippine Dealing System (PDS), the peso gained three centavos to close at 55.530 from Monday’s close of 55.560 to a $1.
Transaction volume amounted to $95.40 million on an average rate of 55.536 to the dollar.
The resignation of Finance Secretary Jose Isidro Camacho – who won investor plaudits for his skill in negotiating overseas bond deals and capping a yawning budget deficit – and the possible presidential bid of action movie star Fernando Poe Jr. are fuelling market jitters.
"The peso will remain volatile for some time," Buenaventura told reporters. "At 55.70, we think it’s overdone. That’s the breaking point."
Camacho announced last week he would quit his job by the end of November because he was exhausted and wanted more time with his family.
His announcement has been followed by other high-level resignations from President Arroyo’s Cabinet in what could be maneuvering ahead of next May’s national elections.
Other Cabinet officials, including Trade Secretary Manuel Roxas II, were also set to resign to run for a Senate seat, according to local media reports.
Buenaventura said the BSP had been ready to intervene in the currency market as the peso fell to near three-year lows on Monday, but banks and some exporters took advantage of the currency’s slide to unwind long dollar positions.
The currency fell to its record low in January 2001 at the height of the impeachment trial of ousted President Joseph Estrada. Estrada’s allies in the opposition have been pushing popular actor Poe to stand in next May’s elections to challenge Mrs. Arroyo, who is seeking a second term.
"On the candidacy, that’s part of the political noise premium (in the peso) we are paying, which is not unexpected," Buenaventura said.