The scary math behind the world’s safest assets: Washington has laid the seeds of a crisis that Wall Street can no longer ignore. Around three-quarters of Treasurys must be rolled over within 5yrs. Say you added just 1ppt to the avg interest rate in the CBO’s forecast and kept every other number unchanged. That would result in an additional $3.5tn in federal debt by 2033. The govt’s annual interest bill alone would then be ~$2tn. For perspective, individual income taxes are set to bring in only $2.5tn this year.