The Wall Street Journal reports today on page C4 that "Big 6-Month CDs Yield 4.12%". This is the average rate on jumbo CDs with deposits of $95,000 or more. Six-month Treasury bills yield 4.97%.
I can understand leaving a few thousand dollars in low-interest accounts for convenience or laziness, but who makes an active to decision to invest $100K at about 1% below market interest rates and thus throw away $1000 a year?