The investment seeks long-term capital appreciation. Under normal circumstances, the fund invests at least 80% of its assets in the equity securities of health care-related companies worldwide as selected by the sub-adviser, Wellington Management Company LLP ("Wellington Management"). The fund takes a broad approach to investing in the health care sector. It may invest in health-related companies, including companies in the pharmaceuticals, biotechnology, medical delivery, medical products, medical services, managed health care, health information services and emerging health-related subsectors.