(1) A steady, noninstantaneous change in rates. Usually a projected change in rates with small, equal, incremental changes in each time period over a series of time periods until the full amount of the projected change is achieved.
(2) A term used in residential lending and in the analysis of mortgage backed securities to describe projections of monthly prepayment speeds which increase from a low initial rate over a series of time periods until the full amount of the expected, final prepayment speed is reached.
See PSA model for an example. American Banker Glossary
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ramp ramp [ræmp] verb
ramp something → up phrasal verb [transitive]
1. FINANCE if someone ramps up a company's shares, they try to persuade people that they are worth more than they really are:
• To ramp up a share price during a takeover bid is unacceptable.
2. COMMERCE if a company ramps up an activity, it increases it:
• Producers can quickly ramp up production to prevent any shortages.
• The company spent millions of pounds ramping up its marketing in the US.
3. FINANCE to increase prices, costs etc:
• The strength of the pound sterling has ramped up the cost of imported materials.
Financial and business terms. 2012.