Definitions of 'Exchange Traded Products' (ETP) & 'Exchange-Traded Fund' (ETF), as per Investopedia:
An Exchange Traded Product, or ETF, is a type of security that is derivatively-priced and which trades intra-day on a national securities exchange. Exchange Traded Products are derivatively-priced, where the value is derived from another investment instruments such as a commodity, currency, share price or interest rate. Generally, exchange traded products are benchmarked to stocks, commodities, indices or they can be actively managed funds. Exchange traded products include exchange traded funds (ETFs), exchange traded vehicles (ETVs), exchange traded notes (ETNs) and certificates.
The most popular exchange traded product is the exchange traded fund (ETF). These are securities that track an index, commodity or basket of assets. Exchange traded notes, on the other hand, are a type of unsecured, unsubordinated debt security. The value of an ETN can be affected by the credit rating of the issuer and not just changes in the underlying index. Exchange traded products have experienced huge growth since they were introduced. Different tax treatment applies to the various types of exchange traded products.
Because it trades like a stock, an ETF does not have its net asset value (NAV) calculated every day like a mutual fund does. By owning an ETF, you get the diversification of an index fund as well as the ability to sell short, buy on margin and purchase as little as one share. Another advantage is that the expense ratios for most ETFs are lower than those of the average mutual fund. When buying and selling ETFs, you have to pay the same commission to your broker that you'd pay on any regular order. One of the most widely known ETFs is called the Spider (SPDR), which tracks the S&P 500 index and trades under the symbol SPY.