I have a very basic question. Why are there many different zero curves for a given currency/market? For example, there are zero curves constructed using gov bonds, swaps, STIR futures, OIS, Inflation, currency basis, etc. When would you use which zero curve?
Furthermore, there are different tenors, e.g. 1M Zero, 3M Zero, etc. When would you use which?
Will you use bond derived z curve when pricing bonds, and swap derived when pricing swaps?
Will you use 1M Zero when pricing swaps where the reference rate is 1M rate?
Thank you in advance!