MNB has received daily, transaction-level data on key Hungarian interest rate derivatives markets since the beginning of 2009 with the launching of the K14 report. The dataset that has accumulated since early 2009 provides an opportunity to better comprehend the structure and functioning of...

A P-sigma-martingale density for a given stochastic process S is a local P-martingale Z0 starting at 1 such that the product ZS is a P-sigma-martingale. Existence of a P-sigma-martingale density is equivalent to a classic absence-of-arbitrage property of S, and it is invariant if we replace the...