Kevin, it's Mark. So maybe I'll talk just thematically, I'll start with our base case assumptions because our medium-term guidance, as you know, refers to a time period within five years, with 2022 as the base year. And that incorporates various assumptions as of the end of January. And those include, for example, U.S. and euro area GDP to stagnate in the near term, followed by recovery, U.S. 10-year treasury yield to stabilize, fluctuating modestly around current levels, issuers continuing to refinance maturing debt. And then on the MA side, customer retention rates to remain in line with historic levels, and of course, pricing initiatives to align with prior practices and our enhancements to customer value. If I maybe pick, to your question, two specific examples, maybe two tailwinds to headwinds. On the tailwinds side, issuance activity tends to track GDP growth over the medium to long term. And our central case models GDP expansion at a level consistent with what prevailed prior to the COVID-19 pandemic. And we've used our GDP and interest rate predictions from Moody's Analytics forecast, which shows that the 2014 to 2019 average annual real GDP growth was between 2% and 3%, and that's sort of what we expect going forward. The second tailwind is something we spoke about extensively on prior calls, that's based on our maturity wall studies. U.S. corporates have $1.9 trillion in maturing debt. The majority, we expect to be refinanced. Similarly, European corporates have refunding needs around $2.1 trillion. And then on the headwinds side, the first one maybe is worth noting is we do project interest rate increases -- sorry, we do project interest rates are going to remain elevated and that may potentially impact opportunistic financing. For example, in the U.S., we model a near-term increase in the 10-year treasury yield. And then we expect that to remain roughly stable at that 4% through 2027. And then finally, in resetting our medium-term target base to 2022, we have assumed constant currency foreign exchange rates over the five-year period, specifically the euro at 1.07 and the pound at 1.20. And that shows dollar appreciation versus the original rates we gave in February last year, which were 1.14 and 1.35.