急問..香港銀行可唔可以發行"按揭證券"(mortgage bond)?

Mortgage bond
Definition
A bond secured by a mortgage on a property. Mortgage bonds are backed by real estate or physical equipment that can be liquidated. These are usually considered high-grade, safe investments. If an issuer in default has both secured and unsecured bonds outstanding, secured bondholders are paid off first, then unsecured bondholders. Naturally, because unsecured bonds carry greater risk than secured bonds, they usually pay higher yields.
咁香港銀行可唔可以咁做ga?