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Pension Curve Insider: LDI Solutions March Monthly Recap

Monthly Recap

In a continuation of recent months, Treasury yields marched higher during February and the curve steepened significantly. Corporate spreads, which had been relatively stable in January, widened steadily through the month.

Plan liability values decreased on a marked-to-market basis in February, extending their decline since the start of the year. Discount rates for a sample plan liability rose by 21 basis points based on the AA-rated spot curve and 18 basis points using the top-yielding curve. At month end, the top-yielding curve provided 29 basis points of additional yield versus the broader AA-rated universe.

In contrast to the market tumult, issuance was relatively calm during the month, with only three bonds entering the index, totaling $1.9B in notional value. New issues had a slight upward impact on the intermediate segment of the curve. No turnover occurred due to credit rating changes, although six bonds exited the universe due to other inclusion criteria.

Liability Impact

Liability Impact
Yield Curve Liability Value
Discount Rate
Liability Value
Discount Rate
Liability Value
Discount Rate
Yield Curve
$10,944 3.36% $11,284 3.15% $11,849 2.82%
Top Yielding
Accounting Curve
$10,499 3.65% $10,775 3.47% $11,192 3.21%
IRS Yield Curve $10,878 3.38% $11,269 3.14% $11,411 3.06%

Sources: Bloomberg Barclays. Bloomberg Index Services Ltd. Copyright 2021, Bloomberg Index Services Ltd. Used with permission. IRS, and T. Rowe Price. Sample plan cash flows have a liability of $10,000 at 4.0% discount rate.

Accounting Curve

Accounting Curve
Issuer Event Curve Impact
Korea Development Bank. New Issue
(2 Bonds)

Korea Development Bank issued two bonds with a combined face value of $1.5B during February. The Seoul-based bank is one of three issuers in the AA-rated universe domiciled in South Korea, which is the third-largest country by market value weight at 5.7%. Dated to mature in 2025 and 2027, the pair traded slightly wide of universe peers at month end and had minimal curve impact. 
The Nature Conservancy New Issues 
(1 Bond)
The Nature Conservancy brought a 30-year, $350M bond to market during the month. Proceeds from the sale are primarily intended to fund “eligible green projects,” either directly or through grants to other organizations. The bond represents the only issue by the environmental nonprofit included within the AA-rated universe and traded significantly wide of similarly-dated peers, but only had a minor upward impact on the curve. 

Sources: Bloomberg Barclays. Bloomberg Index Services Ltd. Copyright 2021, Bloomberg Index Services Ltd. Used with permission. T. Rowe Price.

  New Issues Other Bonds Entering Downgrades Other Bonds Exiting
February 2022        
   Count 3 -- -- 6
   Market Value ($M) $1,869 -- -- $6,183
   Market Value (%) 0.29% -- -- 0.96%
2022 YTD        
   Count 13 -- -- 8
   Market Value ($M) $11,268 -- -- $8,285
   Market Value (%) 1.75% -- -- 1.29%

Sources: Bloomberg Barclays. Bloomberg Index Services Ltd. Copyright 2021, Bloomberg Index Services Ltd. Used with permission. T. Rowe Price.

Top Yielding Accounting Curve

Top Yielding Accounting Curve

Sources: Bloomberg. Bloomberg Index Services Ltd. Copyright 2021, Bloomberg Index Services Ltd. Used with permission. T. Rowe Price.

IRS Curve

IRS Curve

Sources: IRS and T. Rowe Price

Dates AAA Corporate OAS
(basis points)
AA Corporate OAS A Corporate OAS BBB Corporate OAS
January Monthly Average 70 52 77 117
February 1, 2022 74 56 82 125
February 15, 2022 74 56 85 128
February 28, 2022 91 67 99 144
February Monthly Average 82 60 90 133

Sources: Bloomberg Barclays. Bloomberg Index Services Ltd. Copyright 2021, Bloomberg Index Services Ltd. Used with permission. T. Rowe Price.

One Year Rolling Returns and Tracking Error

One Year Rolling Return
  February 2022 Return YTD Total Return Annual Tracking Error Relative to Liability Average Monthly Return Difference from Liability
Hypothetical Sample Plan Liability -2.78% -7.21% NA NA
BBgBarc Aggregate Index -1.12% -3.25% 6.60% 1.44%
BBgBarc Long Credit Index -3.36% -8.66% 4.35% 0.89%
BBgBarc Long Gov/Credit Index -2.54% -7.32% 3.16% 0.63%
Hypothetical T. Rowe Price
Custom Benchmark
-2.32% -6.15% 2.01% 0.33%

Sources: Bloomberg Index Services Ltd., T. Rowe Price; Analysis by T. Rowe Price. Performance shown in graph and tables above shown from February 1, 2005 through February 28, 2022.

Past performance cannot guarantee future results. Custom Benchmark returns do not reflect the deduction of management fees. Please refer to the disclosure at the end of the article for important additional information.

Copyright 2022, Bloomberg Index Services Ltd. Used with permission.


IRS Yield Curve: Plan sponsors of qualified defined benefit pension plans use this yield curve to determine funding requirements per IRS regulations. These funding requirements are disclosed on form 5500 annually. Yields on AAA, AA, and A corporate securities determine the yield curve for discounting purposes. The yield curve is not a marked-to-market curve representing any single date, but rather an average yield over the course of the entire month. For more information on the IRS methodology, please see and

Accounting Yield Curve: US GAAP requires pension plan sponsors to disclose pension obligations using “fixedincome debt securities that receive one of the two highest ratings given by a recognized ratings agency”. As a proxy for bonds useable for accounting purposes, we use the constituents of BBgBarc AA credit universe to develop the accounting yield curve shown. Please see for more information.

Top Yielding Curve: Since the US GAAP rules allow the use of a fairly broad range of securities for accounting purposes, some plan sponsors use an optimized yield curve approach to value their pension liabilities on the disclosure dates. Bonds trading at higher yields than other bonds of similar maturity tend to be used for this purpose. To quantify the effectiveness of this approach, T. Rowe Price developed a yield curve using the highest yielding bonds designed to meet SEC requirements at each node.

Annual Tracking Error Relative to Liability: Calculated as the standard deviation of return differences between a fixed income index and a set of cash flows discounted using the accounting yield curve. The liability return has two components: an interest cost component analogous to roll return on a bond, and yield change component analogous to price return on a bond. The table shows annualized ex-post tracking error.

Average Monthly Return Difference: Similar to the tracking error metric, this metric demonstrates how closely a fixed income benchmark tracks a set of liability returns. We calculate this measure by simply averaging the difference in returns over the period shown.

Sample Plan Liability: Pension plan sponsors must account for the cost of their retirement plan on their financial statements. The amount of this liability can fluctuate over time based on several factors, including benefits earned, benefits paid out, mortality experience, and most significantly, interest rates. The Sample Plan is intended to be a representative defined benefit pension plan and does not reflect the cash flows from any specific plan.

T. Rowe Price Custom Benchmark: An index of fixed income securities created using T. Rowe Price proprietary methodology that attempts to replicate interest rate exposures embedded in a pension plan’s liability structure.
To learn more, please visit


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