I'm working on a project where we're trying to create a database model where we can (daily) update collected data in order to make RPA predictions.
We received data from Interest Rate Curves called IR-CMS(Constant Maturity Swap?) in one file and IR-OIS (Overnight Indexed Swap?) in another.
You see, as the values are exactly the same, the person who started modelling assumed both curves are and behave the same.
From what I've learned, sorry if I'm a bit lost here but I'm new in this: if my understanding is right, aren't CMS and OIS different things? Or why is it safe to assume both curves behave the same way?