You are staring at the crowding out

right there is your post.

Markets were actually closed that day; but on May 1, the interest rate on 10-year bonds was 3.17 percent.

As of right now, the rate is 3.14 percent. Just saying.

Corporate yields drop because of central government's continuing, current purchases of essential resources, that is, crowding out. Corporations had the opportunity of accumulating inventories of the essentials. That opportunity evaporated with the Keynesian experiment.