STS vs Non-STS: When Securitisation Plays by the Rules (and When It Doesn’t)

Some financial products arrive wearing a neat suit and carrying all the right paperwork. Others turn up late, slightly rumpled, and insist they’re more fun anyway. The securitisation market has both, and the velvet rope dividing them is the STS label.

STS – short for “simple, transparent and standardised” – was born from Regulation (EU) 2017/2402, otherwise known as the grand clean-up act after the 2008 crisis. The UK kept it post-Brexit, in slightly altered form, and the idea was straightforward: restore trust in securitisation by rewarding deals that are clear, well-structured, and sufficiently dull to make regulators sleep better at night. Deals that pass muster get to strut around as STS. Those that don’t remain entirely legal, sometimes more lucrative, but a touch less respectable.