A stock market, fairness marketplace or percentage market is the aggregation of consumers and dealers of shares (additionally referred to as stocks), which represent possession claims on companies; those might also include securities indexed on a public inventory exchange, as well as stock this is simplest traded privately, such as stocks of personal businesses which can be sold to investors through fairness crowdfunding platforms. investment in the inventory marketplace is most usually performed via stockbrokerages and electronic buying and selling structures. funding is generally made with an funding approach in thoughts. Stocks may be categorized with the aid of the united states of america where the employer is domiciled. for instance, Nestlé and Novartis are domiciled in Switzerland and traded on the SIX Swiss trade, so they may be considered as a part of the Swiss stock market, although the shares may also be traded on exchanges in different nations, as an instance, the total marketplace capitalization of all stocks worldwide turned into about US$70.75 trillion as of 2016, there are 60 stock exchanges inside the world. of those, there are sixteen exchanges with a marketplace capitalization of $1 trillion or extra, and they account for 87% of world marketplace capitalization. aside from the Australian Securities change, those sixteen exchanges are all in both North america, Europe, or Asia. Impact factor is a measure reflecting the average number of citations to recent articles published in the journal. journal with impact factors and are calculated using citations not only from research articles but also review articles (which tend to receive more citations), editorials, letters, meeting abstracts, short communications, and case report