What’s the Cost of Mortgage-Rate Buydowns and Other Incentives to Homebuilders?

When mortgage rates rose to 6% and then 7%, sales of existing homes plunged by close to 40% from 2021 and by over 30% from 2019 because sellers refused to cut their prices enough to make 7% mortgages work, and buyers lost interest. Commercial real estate has been repricing properties, and the haircuts are massive.