They have mentioned it but definitely less than BRK and FFH. The Q1 2010 earnings calls has specific commentary in the Q&A on float growth, leverage, and equity allocation and its worth reading.
Generally they have prioritised a higher allocation of equities in the book than higher investment leverage. They will do better than Fairfax in a zero interest rate environment all else equal but Fairfax is much better positioned in the current environment.
Here are some of the instances using AI re their mention of float:
1. Status update presentation — "More float, more earnings power"
Andrew Crowley (President of Markel Ventures) explicitly tied float growth to earnings power compounding:
> "During the same timeframe, operating cash flows exceeded operating income by $5 billion, mostly due to the power of increasing insurance float. More float, more earnings power."
The accompanying investor presentation slide also frames growth in float as one of several distinct levers for increasing earnings per share over time, alongside Markel Ventures, public equities, and share repurchases.
2. Q3 2023 earnings call — maximising investment return on float
Jeremy Noble (President of Insurance):
> "The insurance engine also continues to generate significant operating cash flows, and we have been intentional about taking the cash and maximizing the investment return on the float generated by our underwriting operations and attractive market yields."
3. Q1 2022 earnings call — the float spread as the core economic model
Richie Whitt (Co-CEO) articulated the fundamental spread model clearly:
> "We're making a spread of return between the positive yields on the bond portfolio and the negative cost of float that we get through underwriting profitability. And as long as we keep that spread a positive number, things add up to the good over time."