THE peso weakened further on Thursday, losing by 45 centavos against the greenback, while the main index of the Philippines Stock exchange fell as investors remained cautious amid corporate earnings releases. The local currency closed at P63.7, weaker than the P63.25 posted on Wednesday. It opened at P63.25 and traded from P63.25 to P63.7.The volume reached $1.720 trillion, up from the previous P1.421 trillion. Rizal Commercial Banking Corp. chief economist Michael Ricafort said the peso weakened as the US ...