MANILA, Philippines - The Philippines’ credit-worthiness may improve as long as it sustains its trade and financial surplus and minimize the global recession’s “adverse effects" on its finances, a ratings agency said. The country’s financial system “has avoided the types of stress evident in many other systems regionally and globally," said Moody’s Investors Service, which affirmed its B1 rating for government foreign and local currency bonds in February. The country’s balance o...