In the United States, money market funds can be divided into three categories according to the level of risk. 　　 In the United States, money market funds can be divided into three categories according to the level of risk. 　　 1, Treasury bill money market funds, which invest mainly in treasury bills, marketable securities guaranteed by the government, etc. These securities generally have a maturity of less than one year, with an average maturity of 120 days. 　　 2,Diversified money market funds, which are commonly referred to as money market funds, usually invest in a variety of marketable securities such as commercial paper, treasury bills, securities issued by U.S. government agencies, negotiable certificates of deposit, bankers' acceptances, etc., which have similar maturities as the aforementioned funds. 　　 3, Tax-exempt money funds, which are used primarily for short-term financing of high-quality municipal securities, also include municipal medium-term bonds and municipal long-ter

Looking back, since the 1900s, there have been several financial crisis events in history.

The differences between stock options and restricted stock lie in four areas: symmetry of rights and obligations, symmetry of rewards and penalties, waiting period versus confinement period and exercise price versus grant price.

Every time a financial crisis breaks out, there is a depression in all industries, a large number of workers are laid off and people's livelihoods wither away.

Many investors now have many misconceptions about ETF funds, which not only makes many people fearful in the investment process, but also increases investment risks. ETF funds are actually a kind of fund with relatively low market penetration, and customer participation itself is very limited.

Six manifestations of the financial crisis

A financial crisis is a persistent contradiction in the operation of activities related to money and capital, for example, a credit crisis in the cashing of bills, a currency crisis caused by a disconnect between buying and selling, etc.