Short
term interest rates rose in November with the 1 month LIBOR
rate climbing from 1.12 at the end of October to 1.17 at
the end of November. The 5-Year swap rate also rose by 8
basis points in November. On the other hand, the 10-Year
swap rate slightly declined in November, dropping by 1 basis
point. Mortgage rates however managed to climb with the
FNMA 30-Yr Current Coupon Yield climbing to 5.41% and the
GNMA 30-Yr Current Coupon Yield climbing to 5.36%. |
MSR
OASs Show Mixed and Dramatic Movement.
As we have discussed previously, MIAC Analytics makes available
Daily GSA OASs through the Daily GSA pricing service. Each
day, MIAC Analytics will use the previous day’s current
volatility of 1-Year into 10-Year swaption volatility as
a proxy for mortgage volatility.
The table below is the OASs computed in MIAC Analytics with
the actual GSA prices for seventeen of the largest GSAs:
Conventional 15-Year 5.0% Issue Year 2001, Conventional
15-Year 5.0% Issue Year 2003, Conventional 15-Year 5.5%
Issue Year 2001, Conventional 15-Year 5.5% Issue Year 2003,
Conventional 15-Year 6.0% Issue Year 1999, Conventional
15-Year 6.0% Issue Year 2001, Conventional 30-Year 5.0%
Issue Year 2003, Conventional 30-Year 5.5% Issue Year 2001,
Conventional 30-Year 5.5% Issue Year 2003, Conventional
30-year 6.0% Issue Year 2001, Conventional 30-year 6.0%
Issue Year 2003, Conventional 30-Year 6.5% Issue Year 1999,
Conventional 30-Year 6.5% Issue Year 2001, GNMA 15-Year
4.5% Issue Year 2003, GNMA 30-Year 5.0% Issue Year 2003,
GNMA 30-Year 6.5% Issue Year 1999, and GNMA 30-Year 6.5%
Issue Year 2001. The table displays the quarter-end OASs
from 8/1/2002 to 10/1/2003 and then the month-end OASs though
12/1/2003. These recent dates were selected because the
BMA dealer consensus prepayment speeds are available to
assist in the MSR pricing process.
OASs continued to be erratic with some asset classes experiencing
rising OAS and others experiencing declining OASs. The OAS
of a Conventional 15-Year with a 5.5% pass-through rate
and an issue year of 2001 declined by 220 basis points while
the OAS of a Conventional 15-Year with a 5.5% pass-through
rate and an issue year of 2003 increased by 225 bps. Despite
relatively small moves in price, yield curve, annualized
yield volatility, and dealer consensus prepayment speeds
in November, OASs again demonstrated dramatic changes. Month
after month we continue to observe these large swings in
OAS. Using a constant OAS methodology is ineffective for
measuring the expected price sensitivity of servicing rights.
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