A great read from Jesse's Cafe Americain: TED Spread Soars to a New Record:
Symptom of the Euro Dollar Squeeze?
There is a real possibility that the TED Spread blowout is not an artifact of risk per se, but a symptom of the US dollar squeeze in Europe.
US Dollar Rally and Deflationary Imbalances Overseas
TED is an acronym for Treasury and EuroDollar. A Spread is just the difference or 'distance' between one thing and another.
Eurodollars are bank deposits denominated in U.S. dollars but held at locations outside of the U.S.
Initially, the term only referred to dollar deposits in London but has been expanded to include dollar deposits at any offshore location.
T bills are US Treasury debt of short duration are considered to be risk free.
TED Spread = Yield on Eurodollar deposits - Yield on T Bills
The TED Spread is the difference between U.S. Treasury bill yields and yields for Euro deposit contracts of the same maturity, generally three months.
Demystifying the TED Spread