The important thing to keep in mind when being sued by bank card company or junk debt buyers is actually they do not have proof that might otherwise prove that this debt is yours, they don't really use a case. For junk debt buyers, you have luck because these agencies do not have the required documents that might prove you have the debt, as being a signed contract between you and the original creditor, because these documents aren't released with the original creditor. 3. The role of securities investment The proposed acquisition of calcium chloride will improve the self-balancing ability of chlorine and alkali and guarantee the stability of industrial chain At present, about the nature of the enterprise. Western economists have different views. There is also some debate. Some western economists analyze the nature of the enterprise mainly from the perspective of transaction costs that coase emphasizes. In economic terms, the benefits of holding any two currencies should be equal in the equilibrium of the foreign exchange market, which is: Ri=Rj (interest rate parity). Here, R stands for yield, and I and j represent currencies of different countries. If the benefits of holding two currencies are unequal, you will have A arbitrage: buy A kind of foreign exchange and sell B foreign exchange.