Ohio Public Employees Retirement System, Columbus, put Capital Guardian Trust on watch for performance of its $1 billion international equity portfolio, according to a news release from the $60 billion system. Cap Guardian manages about 8% of the system's international equity portfolio. The firm also remains on watch for its $195 million active domestic small-cap equity portfolio. Cap Guardian also runs $280 million in emerging market debt for the system. Chuck Freadhoff, Cap Guardian spokesman, declined comment.