Changes in plan assets and benefit obligations recognized in regulatory assets, for the year
ended December 31, 2020, were as follows:
(in thousands) DB Plan OPEB Plans
Regulatory asset balance, beginning of period $ 10,269 $ 1,078
Net actuarial loss incurred during the period 2,733 621
Prior service cost incurred during the period - 16
Recognized net actuarial gain (477) (43)
Regulatory asset balance, end of period $ 12,525 $ 1,672
Amounts recognized in regulatory assets for the DB and OPEB Plans that have not yet been
recognized as components of net periodic benefit cost of the following as of December 31,
2021:
(in thousands) DB Plan OPEB Plans
Net actuarial loss $ 8,454 $ 1,205
Prior service cost - (99)
Regulatory asset $ 8,454 $ 1,106
Amounts recognized in regulatory assets for the DB and OPEB Plans that have not yet been
recognized as components of net periodic benefit cost of the following as of December 31,
2020:
(in thousands) DB Plan OPEB Plans
Net actuarial loss $ 12,525 S 1,787
Prior service cost - (115)
Regulatory asset $ 12,525 oe 1,672
The key assumptions used to value benefit obligations and calculate net periodic benefit cost
for our DB and OPEB Plans include the following:
2021 2020
Discount rate for net periodic benefit cost, beginning of year 2.39% 3.13%
Discount rate for benefit obligations, end of year (a) 2.74% 2.39%
Expected return on plan assets for the period (net of investment expenses) 7.00% 7.00%
Rate of compensation increase, beginning of year 3.00% 3.00%
Healthcare cost trend rate (applicable only to OPEB Plans) 5.50% 6.00%
An increase or decrease in the discount rate of 0.5% would result ina change in the funded status as of December
31, 2021, for the 06 Plan and the OPEB Plans of approximately $3.3 million and $515 thousand, respectively.
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