Is it a typo or is that the way it is?
Assume that interest rates in the year 2010 decrease below historical averages. They continue their downward trend for years 2011 and 2012. In which year would a MBS be least likely to be experience high rates of prepayment?
Your answer: A was incorrect. The correct answer was C) 2012.
In a mortgage-backed security (MBS), whether a mortgage is called depends on the path of previous interest rates. If rates have been on a downward trend, then fewer mortgages will be refinanced as the trend continues because homeowners that have wanted to refinance will have already done so. Thus fewer mortgages will be refinanced in the year 2012 than in the earlier years.
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