Holy moly, to clarify why they are paid once a year.....I found these instruments on ANNA, and they are listed as bonds that calculate interest on an annual basis. So investors are only getting annually paid.
I just started tracking the half of the 40 WMIH CORP ISIN security codes that I had previously posted, that were not listed by Schwab as Matured or Liquidated.
You can get a free ANNA-web.org ISIN bond library access account. This allows you to find and record each one. I've only looked at two, and they are CFI instruments, ie mutual funds that track other mutual funds. They do exist. These two ISIN coded bonds are titled Washington Mutual Savings Bank Seattle, 4% and 4.8% ACT 365.
Gonna go thru the rest of them, probably take a while.