U.S. stocks retrench as Europe drives trade Greece debt talks in view; P&G drags on blue-chips SAN FRANCISCO (MarketWatch) — U.S. stocks slipped Monday, with Europe’s next steps -- including the terms of a likely Greek default -- dominating trading. http://www.marketwatch.com/story/us-stocks-edge-up-on-europe-hopes-2012-01-23?link=MW_home_latest_news