[Verse 1]
Portfolio manager Sarah holds a pension fund
Twenty billion dollars worth of future payouts bound
Workers counting on their golden years secured
But rates keep shifting like a pendulum obscured
She needs a strategy that locks in what she's planned
Duration matching is her secret weapon grand
[Chorus]
Match the duration, assets to debt
When interest swings, you're covered yet
Duration matching, risk defense
Present value makes perfect sense
Match the duration, bond by bond
Keep your liabilities respond
[Verse 2]
Duration measures sensitivity to rate
A five-year duration means five percent fate
If rates climb one percent, your value drops five
But matching both sides keeps your balance alive
Assets fall, liabilities shrink the same amount
Zero net exposure is what truly counts
[Chorus]
Match the duration, assets to debt
When interest swings, you're covered yet
Duration matching, risk defense
Present value makes perfect sense
Match the duration, bond by bond
Keep your liabilities respond
[Bridge]
Calculate the weighted average time
Of every cash flow in your paradigm
Modified duration shows the price elastic
Interest rate immunity, simply fantastic
Convexity adjustments for precision fine
But duration matching draws the baseline
[Verse 3]
Pension pays retirees in fifteen years exact
Portfolio duration must mirror this fact
Buy bonds that mature when payments come due
Interest rate fluctuations won't derail you
Immunization strategy, bulletproof design
Duration matching keeps your future aligned
[Chorus]
Match the duration, assets to debt
When interest swings, you're covered yet
Duration matching, risk defense
Present value makes perfect sense
Match the duration, bond by bond
Keep your liabilities respond
[Outro]
When rates surprise you with their volatile dance
Duration matching gives you fighting chance
Assets and debts move in perfect sync
No sleepless nights, no missing link