Interest rate futures
What is implied repo rate modeling and how does it impact the futures premium of interest rate products?
By Easy Money Scanner · Educational reference · Not investment advice
The short answer
Implied repo rate reflects the theoretical return from buying the CTD bond and simultaneously selling futures, financed via repo; it helps traders assess whether futures trade rich or cheap relative to fair value.
How it works
If the implied repo rate exceeds actual market repo rates, the basis trade (long bond, short futures) is profitable, pulling futures prices down toward fair value until the arbitrage closes.
An example
When the implied repo rate on ZN futures rises above prevailing overnight repo rates, arbitrageurs buy the CTD note and short futures to capture the spread.
Risk & limitations
Repo market volatility, such as the September 2019 repo spike, can distort implied repo rate signals and disrupt normal basis trading relationships.
Examples are hypothetical, not trade recommendations. US contract and regulatory references do not automatically apply in Canada. Rules, margin requirements and broker policies can change; confirm them with the relevant authority and your broker.