270 day libor

If I’m given 270 day libor and am asked to calculate a 270 day forward, do I need to adjust my rates by (270/360)? I think the answer is yes but I don’t see why. So is it a rule that you would always adjust libor rates regardless of how they are quoted?

Interest rates are always – _ always! _ – quoted as annual rates.

If they say that 270-day LIBOR is 4%, that’s 4% for one year: 360 days. It’s 3% for 270 days.

Thank you. Why is there such a thing as 270 day libor then?

Because the 270-day rate is different from the 180-day rate, and the 360-day rate, and the 90-day rate, and so on.

This wouldn’t be unusual:

  • 90-day LIBOR: 3.2% (0.8% for 90 days)
  • 180-day LIBOR: 3.6% (1.8% for 180 days)
  • 270-day LIBOR: 3.9% (2.925% for 270 days)
  • 360-day LIBOR: 4.1% (4.1% for 360 days)