What is a maturity gap? How can the maturity model be used to immunize an FIs portfolio?

Question:

What is a gap? How can the model be used to immunize an FI’s portfolio? What is the critical requirement that allows matching to have some success in immunizing the of an FI?
Balance Sheet
Balance sheet is a statement of the financial position of a business that list all the assets, liabilities, and owner’s equity and shareholder’s equity at a particular point of time. A balance sheet is also called as a “statement of financial... Maturity
Maturity is the date on which the life of a transaction or financial instrument ends, after which it must either be renewed, or it will cease to exist. The term is commonly used for deposits, foreign exchange spot, and forward transactions, interest...