Early indications suggest that Wall Street stocks may open Friday’s session modestly lower as commodities turn southward. Among the global markets, Asian stocks ended mostly higher amid the release of negative inflation data from Japan. The European markets are seeing volatility, although they are slightly higher by early afternoon trading. The dollar is mostly higher. With Monday’s Memorial Day holiday looming, trading activity could be light. The markets could also track economic data on first quarter GDP and consumer sentiment, a speech by Fed Chair Janet Yellen and the communiqu‚ from the meeting of G7 leaders in Japan.