Polymesh is like a high-quality, secure computer system that is made just for things like stocks and other valuable things. It makes it easier to handle these things and lets new types of money tools be created. It does this by solving problems around making sure everything is done right, who is allowed to do certain things, keeping things secret, and getting everything finished. Polymesh is made from a special system called Substrate and uses a way of doing things that is trusted called Nominated Proof of Stake Consensus.