Any transaction can be seen as a contract between the two parties. The so-called transaction cost can be seen as the cost of the transaction contract. According to Mr Coase and others, a type of transaction costs arise from the accidental factors that occur when a deal is signed. These incidental factors may not be written into the contract due to the fact that they could not be foreseen in advance, or although they could be foreseen, they could not be written into the contract due to too many factors. Another type of transaction costs is the signing of contracts and the cost of monitoring and enforcing contracts. The principle of rational investment: investment in securities investment in analysis and comparison. China's understanding of the market is mainly based on mechanical reference to western economic theory, but it ignores their assumptions and implicit assumptions. China's so-called mainstream economists' understanding of the market is more of a new classic. In other words, the market is an efficient allocation of social resources pricing mechanism. Although China has introduced new institutional economics, it has not read the meaning of "property rights", and mechanically believes that property rights are based on "stock of property". The Method and Madness range includes four new Irish whiskeys. Each whiskey has its own twist; a single pot still Irish whiskey finished in French chestnut, a single grain Irish whiskey finished in virgin Spanish oak, a single malt Irish whiskey enhanced by French limousin oak and a 31-year-old single cask, single grain limited edition bottled at cask strength.