At any given time, the stock requirement of an FHLBank Boston member is determined as the sum of its Membership Stock Investment Requirement (MSIR) and ABSIR.
Per FHLBank Boston’s present Capital Plan, MSIR is calculated as 0.05% of the membership stock investment base, defined as the member’s total assets (or total net admitted assets, excluding separate accounts, for insurance company members) at the prior year-end. MSIR is a minimum of $10,000 and a maximum of $5 million.
The ABSIR varies based on the activity. For overnight advances, such as the Daily Cash Manager Advance, the requirement is 3.00% of the principal balance. For all advances with terms of two days or more, the requirement increases to 4.00%. Letters of Credit have a requirement of 0.25% of the notional amount.
These ABSIR requirements allow FHLBank Boston to operate prudently while preserving maximum balance sheet flexibility. If demand for advances increases, members’ required stock purchases allow FHLBank Boston’s balance sheet to expand and absorb the change in its assets.
Evidencing this fact in the first three quarters of 2022, advances outstanding have increased 172.8%, and the overall balance sheet has increased 80.9%. FHLBank Boston’s self-capitalizing model allows it to provide reliable funding against quality collateral and ensure safety and soundness is maintained.