Lately, there has been great demand to meet rising supply of investment-grade debt securities, especially with the newly erected backstops and FFH did well to wait a bit for the dust to settle.
It's interesting to compare to their last June 2019 500M CDN debt issue (unaudited and some adjustments because of the CDN USD differential):
June 2019 issue= 10-yr risk-free=1.53% + IG spread=2.38% + FFH-specific spread=0.33% =) 4.24%
April 2020 issue= 10-yr risk-free=0.61% + IG spread=3.26% + FFH-specific spread=0.78% =) 4.65%
By waiting a few days (since the "peak" CV vertigo on March 23), the IG spread has come down by 0.61% and i would bet that the FFH-specific spread has come down also.
There are many potential perspectives on this but they recently mentioned that they used part of the funds obtained on the revolver to buy corporate debt and now they are paying back the revolver using funds obtained while issuing Baa3 debt.
https://www.moodys.com/research/Moodys-rates-Fairfax-Financials-senior-notes-Baa3--PR_1000002674