The real yield on ten-year, inflation-indexed Treasury bonds has fallen from 1.05% to 0.5%, a result of relatively flat nominal yields and a rise in expected inflation.
If a bond has a 7% nominalyield or coupon and was purchased at a premium of $103 ($1030), then your YTM will calculate lower because the 7% interest is only paid to the $1000 par.
The preferred stock comes with an annual dividend yield of 10% and warrants giving the Treasury the right to acquire 79.9% of the companies' common stock 'at a nominal price.