The “best” time to buy Treasury bills is when you decide you need to set some money aside for complete safety. T-bills are IOUs from the Federal government — the safest global investment as determined by global markets. You’ll earn an interest rate set each week by the institutions that bid on the billions of new T-bills sold (or refionanced by the government as they mature) each Monday. T-bills are “chicken money” — the safe place for your nestegg. They won’t make you rich, but you won’t be poor, either. Read my recent article on How to Buy Treasury Bills.