Bob wants to buy Ethereum. He only has Bitcoin. On an instant-access exchange, he will trade Bitcoin for Ethereum. He will provide the target address of his Ethereum wallet to receive the Ethereum he wants to purchase, and he will also provide a refund address for Bitcoin, most likely the address from which he will be sending his Bitcoin to the exchange. Once he will submit the order, Bob will be asked by the exchange to send the necessary amount of Bitcoin to an address. Once he will send this money and it is confirmed, the instant-access exchange will handle all the buy/sell operations on his behalf, and will send the Ethereum once the order has been fulfilled.
Fair Dealing in Securities Transactions: Depending on the standard rules of demand and supply, the stock exchange needs to ensure that all interested market participants have instant access to data for all buy and sell orders thereby helping in the fair and transparent pricing of securities. Additionally, it should also perform efficient matching of appropriate buy and sell orders.
Though it is called a stock market or equity market and is primarily known for trading stocks/equities, other financial securities - like exchange traded funds (ETF), corporate bonds and derivatives based on stocks, commodities, currencies, and bonds - are also traded in the stock markets. (For related reading, see "What's the Difference Between the Equity Market and the Stock Market?")
Stock exchanges operate as for-profit institutes and charge a fee for their services. The primary source of income for these stock exchanges are the revenues from the transaction fees that are charged for each trade carried out on its platform. Additionally, exchanges earn revenue from the listing fee charged to companies during the IPO process and other follow-on offerings.
B (Good) - The stock has a good track record for balancing performance with risk. Compared to other stocks, it has achieved above-average returns given the level of risk in its underlying investments. While the risk-adjusted performance of any stock is subject to change, we believe that this fund has proven to be a good investment in the recent past.
Alternatively, you may be looking at digging hidden gems that may be well below the top 50 or top 100 projects, but still have a very solid technology or are undervalued. Doing your own research may help here, but of course it will require more investment and time spent, with a possibly longer ROI (Return on Investment) but the hope of higher gains.
While today it is possible to purchase almost everything online, there is usually a designated market for every commodity. For instance, people drive to city outskirts and farmlands to purchase Christmas trees, visit the local timber market to buy wood and other necessary material for home furniture and renovations, and go to stores like Walmart for their regular grocery supplies.