"SOFR first" has been mentioned for a long time and was suppose to start in July 2021. There have been many partial achievements along the way. To our opinion, last week was the first time we can mention SOFR First without adding inverted commas around it.
The LCH data indicates that more than 50% of the USD LCH-cleared interest rate derivatives was based on SOFR. Up to now, the achievements had been relative, like "more SOFR than LIBOR". This time, we can really say for the first time "SOFR dominates the USD rate benchmarks".
Figure 1: Weekly share by product types at LCH