Any particular situations which can lead to this?
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$\begingroup$ They are considered to be more financially stable that the US government. They are considered to have lower volatility than US treasuries thus a lower risk premium. They are smaller quantities of the issues and greater demand leading to higher prices and lower yields. $\endgroup$– Attack68 ♦Sep 29 at 8:46
1 Answer
I can’t find any today. Johnson and Johnson is rated AAA and the 10yr yield is Treasury +29bp. There may have been a time during the debt ceiling drama where very short dated corporate paper traded better than Treasury bills, since the latter were potentially subject to a payment delay.