October 31, 2008

Subject to underwriting approval, the Bank allows members to lock in a rate prior to disbursement of an advance. Commitment fees are generally charged for advances to be disbursed beyond next-day disbursement. The Bank's current commitment fee is generally based on the following formula:

Fee = Principal amount of advance * (A-D) * (Days forward/360) + $100

where:

A = Rate for advance with same final maturity, including the commitment period, for regular (next-business-day) disbursement

D = The Bank's deposit rate for period of commitment

The Bank may alter this fee based on market conditions and other considerations. As with all of the Bank's credit products, it is best to contact the Money Desk, at moneydesk@fhlbboston.com or 1-800-357-3452, for prices on specific transactions. The commitment fee is normally added to the advance's rate.