For example, if underlying hedge funds were to purchase financial futures contracts for speculative versus hedging purposes, which is common, pension investment restrictions may be violated.

FORBES: Pensions Perilously Binging Upon Hedge Funds, Funds of Funds and Funds of Funds of Funds (March 20, 2007)

In search of profitable opportunities, Bridgewater buys and sells more than a hundred different financial instruments around the world from Japanese bonds to copper futures traded in London to Brazilian currency contracts which explains why it keeps a close eye on Greece.

NEWYORKER: Mastering the Machine