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65
Unum 2015 Annual Report
The following two tables show the length of time our investment-grade and below-investment-grade fixed maturity securities had
been in a gross unrealized loss position as of December 31, 2015 and at the end of the prior four quarters. The relationships of the current
fair value to amortized cost are not necessarily indicative of the fair value to amortized cost relationships for the securities throughout the
entire time that the securities have been in an unrealized loss position nor are they necessarily indicative of the relationships after
December 31, 2015. The increase in the unrealized loss on fixed maturity securities during 2015 was due primarily to an increase in both
U.S. Treasury rates and credit spreads which occurred during the period.
Unrealized Loss on Investment-Grade Fixed Maturity Securities
Length of Time in Unrealized Loss Position
2015 2014
(in millions of dollars) December 31 September 30 June 30 March 31 December 31
Fair Value < 100% >= 70% of Amortized Cost
<= 90 days $ 73.2 $ 34.0 $103.9 $ 3.0 $23.2
> 90 <= 180 days 56.0 108.4 15.6 5.7 0.7
> 180 <= 270 days 157.9 17.2 8.7 — 0.1
> 270 days <= 1 year 24.9 15.5 0.1 — —
> 1 year <= 2 years 17.3 0.1 0.6 7.4 20.4
> 2 years <= 3 years 9.7 10.2 11.9 1.3 2.2
> 3 years 2.9 0.1 0.1 0.1 0.9
Subtotal 341.9 185.5 140.9 17.5 47.5
Fair Value < 70% >= 40% of Amortized Cost
> 90 <= 180 days 3.8 9.0 — — —
> 180 <= 270 days 11.1 — — — —
> 1 year <= 2 years 3.6 — — — —
Subtotal 18.5 9.0 — — —
Total $360.4 $194.5 $140.9 $17.5 $47.5