Stocks based on the price of crude oil include the United States Oil Fund, United States Heating Oil Fund, PowerShares DB Oil Fund, Market Vector Oil Services and Goldman Sachs Crude Oil Total Return, according to About.com. These stocks are called exchange-traded funds, or ETFs, as Investopedia explains.
ETFs have stock ticker symbols like any other stock on an exchange, according to About.com. For example, the United States Oil Fund uses "USO" as its ticker symbol, whereas the United States Heating Oil Fund uses "UHN" as its symbol. About.com lists 25 major ETFs based on the price of crude oil and oil futures.
Some ETFs are part of an energy sector commodity fund that includes stocks of oil companies, explains Investopedia. The Energy Select Sector SPDR fund, or "XLE" on the stock exchange, has $12 billion in managed assets as of April 2015. This fund invests in Exxon Mobil and ConocoPhillips. Vanguard Energy, or "VDE" on the stock exchange, manages $3.92 billion in assets coming from all sectors of the oil industry. The United States Oil Fund bases its stock solely on the price of light sweet crude, and the fund is worth a total of $1.17 billion.
Commodity investing through stocks, including crude oil stocks, may lead to volatile stock prices, according to Bloomberg. However, when the prices of oil stocks dip lower due to less expensive oil prices, it may signal a good time to purchase such stocks.