WRAPUP 2-Brazil's beleaguered currency rebounds after intervention threat
(Adds Treasury debt market intervention, updates markets)
* Tombini does not rule out using reserves to boost currency
* Real rebounds to 4.069 per dollar from 4.248
* Central bank raises inflation forecast
* Unemployment rate rose in August to 5-year high
By Alonso Soto and Walter Brandimarte
BRASILIA/SAO PAULO, Sept 24 (Reuters) - Brazil's depressed currency rebounded on Thursday after the head of its central bank vowed to use all instruments in its arsenal to curtail the real's collapse as investors fret over the future of Latin America's largest economy.
The real, which earlier in the session had tumbled to a new all-time low of 4.248 to the U.S. dollar, bounced back to 4.023 after central bank president Alexandre Tombini, in an unscheduled press briefing, did not rule out selling part of the country's $371 billion foreign reserves to calm the exchange rate market.
"In this process (to tame volatility), all instruments are available for the central bank," Tombini said. "Foreign reserves are an insurance that could and should be used." Continuación...