While most people may think that having more members automatically equals more assets, this data proves that is not the case. Several different things impact both membership and assets. Membership requirements, such as those for the American Airlines and Boeing Employees Credit Unions limit the number of members they can have.
For example, to join Boeing Employees Credit Union, also known as BECU, you must be a Washington State resident. To join American Airlines Credit Union, you have to have been an employee of the airline or the air transportation industry, and if not, you have to be sponsored by someone who was. If the membership base has access to a lot of funds, such as the airline employees who have relatively high incomes, then naturally, their assets could be higher than other credit unions who have more people.
Credit Union Access. Data Current as of December 2008. This article will be updated when newer data is available.