Quote from crgarcia:
Soon after, the fund was forced into an all-too typical scenario: Increased margin requirements and requests for additional collateral. Drake's letter also references "predatory trading" with respect to its counter-parties, the big brokers. This means that dealers are no longer risking their own capital, or even providing narrow bond bid-ask spreads, to Drake in a bid to win the fund's trading business. In essence, the brokers know that the fund is weak and have little risk in trading against it.