Eurodollar futures are priced as 100 minus the 90 day interest rate on dollar denominated deposits in non US banks (LIBOR).
F = 100 - R
Where R = 90 Day LIBOR, annualized to 360 days.
The main difference between Eurodollar futures and Eurodollar time deposits is that Eurodollar time deposits are add-on instruments.
Direct comparison can not be made between Eurodollar futures and Eurodollar time deposits whereas a comparison between US T-Bill futures and Eurodollar futures can be made.
1 bps change in the interest in Eurodollar Future contract of $1 million will result in a change of 25$
1,000,000 x (1 - 5% x 90/360) = 987500
1,000,000 x (1 - 5.01% x 90/360) = 987475
987500 - 987475 = 25
On the other hand with Eurodollar time deposits if $1m is deposited for 90 days then PV on 10% interest rate is
1,000,000 / (1+10%)^(90/360) = 976454.09
1,000,000/(1+10.1%)^(90/360) = 976431.84
976454.09 - 976431.84 = 22.19
It is clear that 1 bps change in Eurodollar Futures is of $25 whereas in Eurodollar Time deposits it is $22.19
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