That's a nice way of saying that during recent years the Harvard Management Company, the university's investment subsidiary, diverted large portions of the university's endowment assets out of safe but poky low-yield securities (as of last June fixed-income investments accounted for only 16% of Harvard's portfolio) and into what this Forbes story describes as "exotic financial instruments": derivatives, hedge funds, private equity partnerships, commodities and emerging-market equities.
For example, if one had shifted assets out of the U.S. into a broad array of investible high yield countries with favorable freedom dynamics four years ago (slightly before the global credit crisis), he would have strongly outperformed the Dow Jones Industrial Average.