This book outlines the basic concepts of investing in oil and natural gas through financial derivative products called ETCs. In particular, the following topics are covered:classification of financial products and general properties such as liquidity, availability, volatility, risk, derivative products, leveragecalculation of simple interest, compound interest and percentage mathematicscosts of financial products, taxes and profitscharacteristics, types, risks and costs of ETCsuses and markets of oil and natural gasparameters affecting oil and natural gas prices such as production, consumption, stocks, geopolitical factors, speculation, correlationsportfolio management strategiesexamples of investing in oil and natural gas through ETCsEach topic is covered from a practical and operational point of view, going on to explicate significant numerical examples.