Weighted Average Loan Age (WALA) 

The weighted average number of months since the date of the loan origination of the mortgages in a mortgage pass-through security pool issued by Freddie Mac, weighted by the size of the principal loan balances.

Remarks: Bond funds including mutual funds (open-end and closed-end, actively managed and indexed), exchange-traded funds and unit investment trusts offer a convenient and affordable way to invest in a diversified portfolio of bonds, but a bond fund investment can differ from a bond investment in ways that are important to understand.