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If there is an upper limit, or cap, on the interest rate you can be charged on an adjustable-rate loan, it's known as a ceiling.
Even if interest rates in general rise higher than the interest-rate ceiling on your loan, the rate you're paying can't be increased above the ceiling.
However, according to the terms of some loans, lenders can add some of the interest they weren't allowed to charge you because of the ceiling to the total amount you owe. This is known as negative amortization.
That means, despite a ceiling, you don't escape the consequences of rising rates, though repayment is postponed, often until the end of the loan's original term.
Ceiling can also refer to a cap on the amount of interest a bond issuer is willing to pay to float a bond. Or, it's the highest price a futures contract can reach on any single trading day before the market locks up, or stops trading, that contract.
(1) The uppermost surface of a room or space. When a lease makes all improvements “below ceiling”the responsibility of the tenant,one must ask if “ceiling”means the concrete bottom of the floor above,or if it means the suspended grid system with ceiling tiles.The space in between the two is called the plenum.All the wiring,plumbing,and ductwork go through the plenum,so the choice of which surface is the “ceiling”could mean a substantial difference in tenant responsibilities.
(2) An upper limit on something,such as the IRS ceiling of $1,000,000 worth of home mortgage debt for which one can deduct mortgage interest.