The tradeoff here is that you typically give up a bit in the way of stated interest rates in return for the option to raise your rate.

FORBES: CD Strategies: Minimizing Your Risks While Maximizing Your Returns

Except, it comes after the institution released its first ever long-term forecasts for interest rates, and stated that it expected rates to be at their current historic low rate until at least the end of 2014.

BBC: Central banks: A long way from decoupling