SAN FRANCISCO The dollar gained slightly on Wednesday, pushing the euro down from its highest level since early July, as a dimming outlook for Greece and weak Japanese trade data reduced traders’ appetite for stocks. Coming up is the release of minutes from the Federal Reserve’s latest policy meeting. The dollar index , which measures the greenback against a basket of six major currencies, rose to 82.069 from 81.939 late Tuesday. The euro slipped to $ 1.2441, from $ 1.2463 on Tuesday.

