The Two Families That Matter

Interest rate swap

The plain vanilla contract: one party pays a fixed rate on the notional, the other pays a floating rate (now SOFR in dollars, after the retirement of LIBOR), and they net. A borrower with a floating-rate loan who pays fixed on a swap has synthetically converted the loan to fixed-rate debt without refinancing it. This is the mechanism behind most commercial real-estate “fixed rate” financing and behind the rate hedges inside insurance and pension balance sheets — including the ones on the other side of your annuity (section “Annuities”).

Total Return Swap (TRS)

One party pays the total return of a reference asset — price appreciation plus dividends — and receives a financing rate, typically SOFR plus a spread, on the notional. The other side takes the mirror. The party receiving total return has the full economic exposure of owning the asset without owning it, having borrowed the entire purchase price embedded in the contract.

Currency swaps, commodity swaps, and credit default swaps round out the market. A credit default swap is worth understanding in one line, because it is routinely mischaracterized: it is insurance on a bond, where the buyer pays a periodic premium and receives a payout if the reference issuer defaults. Nothing more exotic than that; the 2008 damage came from selling it in size without reserves, not from the instrument.