profitability ratios analysis and interpretation Investment in securities provides an important channel for the society to raise funds, which is an effective way for enterprises to raise direct financing. Yu 'ebao, the world's largest money fund, took only four years to achieve the equivalent of 10 years of development, with a maximum annual yield approaching 7%. But in its rapid development, there have also been a big wave of backwater, the most severe, from March 2015 to September 2016, the yield was down from 4.4 percent to about 2.4 percent. The social profit generated by enterprise activities is the addition of economic profit or the external economic effect of the activity. Companies may make significant monetary profits, but external economic effects often result in negative results, and substantial social profits may be minimal. Such as the industrial revolution, the mass production of the factory is low cost and price of product, but in order to earn maximum profit, factory owners and lower production costs, lead to the low wages of child labor, as well as improper handling industrial waste or contaminants and other social burden. We have been using internet banking for quiet sometimes now. Even though there are internet banking security breach occasions, nevertheless the percentage is quite small. People has learned to be very careful and protecting themselves when you use internet banking. Internet banking users are smart people and they understand how to protect their computer from malware and hacker which has the possible to interrupt into their internet checking account. 1) operation special car When bank of America merrill lynch survey of investors results also showed that as many as 8% of the respondents expected net amount, 2018 of the yield curve will become flat, it is up to the number of records since June last year.