as titled, for an upward slopping spot curve, why is the forward curve lying above spot curve? and why is par curve the lowest
also how should i understand this statement
If the spot curve is downward sloping (upward sloping), increasing the initiation date (T*) will result in a forward curve that is a greater distance below (above) the spot curve. appreciated
The 5-year spot rate is a sort of average of five 1-year forward rates: one starts today, one starts in 1 year, one starts in 2 years, one starts in 3 years, and one starts in 4 years.
Think about an average of 4 numbers, then add one more number to the group. If the average of the 5 numbers is higher than the average of the first 4, what can you say about the fifth one you added? It has to be higher than the average of all 5.
So it is with spot rates and forward rates: if the 5-year spot rate is higher than the 4-year spot rate, then the fifth forward rate (starting at time 4 and ending at time 5) has to be higher than the 5-year spot rate.