[Verse 1]
Meet Sarah's bond, it started Triple A
The golden grade that made investors stay
But quarterly reports began to fray
Her company's debt climbed day by day
The rating agency took another look
Downgraded twice, rewrote the book
[Chorus]
Migration matrix tells the tale
Where ratings climb or ratings fail
Up means cheaper borrowing costs
Down means money that gets lost
Track the patterns, watch the shift
Rating changes make portfolios drift
[Verse 2]
Investment grade to junk in eighteen months
A fallen angel's painful, costly stunts
From BBB to BB overnight
Portfolio managers lose sleep and fight
Pension funds must sell by legal rule
When ratings drop, there's no escape tool
[Chorus]
Migration matrix tells the tale
Where ratings climb or ratings fail
Up means cheaper borrowing costs
Down means money that gets lost
Track the patterns, watch the shift
Rating changes make portfolios drift
[Bridge]
Stable outlook doesn't guarantee
Tomorrow brings uncertainty
Economic cycles push and pull
Making rating buckets drain or full
Upgrade brings the spread compression
Downgrade sparks the mass recession
[Verse 3]
Historical data shows the way
Most ratings tend to roughly stay
But recessions bring the avalanche
When downgrades steal your second chance
Default rates spike in lower tiers
Migration studies calm investor fears
[Chorus]
Migration matrix tells the tale
Where ratings climb or ratings fail
Up means cheaper borrowing costs
Down means money that gets lost
Track the patterns, watch the shift
Rating changes make portfolios drift
[Outro]
From AAA to D there's quite a range
Every notch brings price and yield change
Study migration, know the score
Rating shifts unlock the door