Investment has different meanings in finance and economics. Finance investment is putting money into something with the expectation of gain, that upon thorough analysis, has a high degree of security for the principal amount, as well as security of return, within an expected period of time. In contrast putting money into something with an expectation of gain without thorough analysis, without security of principal, and without security of return is speculation or gambling. As such, those shareholders who fail to thoroughly analyze their stock purchases, such as owners of mutual funds, could well be called speculators. Indeed, given the efficient market hypothesis, which implies that a thorough analysis of stock data is irrational, all rational shareholders are, by definition, not investors, but speculators.

Investment is related to saving or deferring consumption. Investment is involved in many areas of the economy, such as business management and finance whether for households, firms, or governments.

Warren Edward Buffett (/ˈbʌfɨt/; born August 30, 1930) is an American business magnate, investor, and philanthropist. He is widely considered the most successful investor of the 20th century. He is the primary shareholder, chairman and CEO of Berkshire Hathaway. He is consistently ranked among the world's wealthiest people. He was ranked as the world's wealthiest person in 2008 and is the third wealthiest person in the world as of 2011. In 2012, American magazine Time named Buffett one of the most influential people in the world.

Buffett is called the "Wizard of Omaha", "Oracle of Omaha", or the "Sage of Omaha" and is noted for his adherence to the value investing philosophy and for his personal frugality despite his immense wealth. Buffett is also a notable philanthropist, having pledged to give away 99 percent of his fortune to philanthropic causes, primarily via the Gates Foundation. On April 11, 2012, he was diagnosed with prostate cancer.

Buffett was born in 1930 in Omaha, Nebraska, the second of three children and only son of U.S. Representative Howard Buffett, a fierce critic of the interventionist New Deal domestic and foreign policy, and his wife Leila (née Stahl). Buffett began his education at Rose Hill Elementary School in Omaha. In 1942, his father was elected to the first of four terms in the United States Congress, and after moving with his family to Washington, D.C., Warren finished elementary school, attended Alice Deal Junior High School, and graduated from Woodrow Wilson High School in 1947, where his senior yearbook picture reads: "likes math; a future stock broker."

Gerald Celente (born November 29, 1946) is an American trend forecaster, publisher of the Trends Journal, business consultant and author who makes predictions about the global financial markets and other events of historical importance. Celente has described himself as a "political atheist" and "citizen of the world". He has appeared as a guest on television news shows such as The Oprah Winfrey Show, The Today Show, Good Morning America, CBS Morning News, The Glenn Beck Show, NBC Nightly News, The Alex Jones Show and Russia Today.

Celente was born in The Bronx, New York City, New York. He had early political experience running a mayoral campaign in Yonkers, New York and served as executive assistant to the secretary of the New York State Senate, which Celente called the worst job he ever had. From 1973 to 1979 Celente traveled between Chicago and Washington D.C. as a government affairs specialist. In 1980 Celente founded The Trends Research Institute (at first called the Socio-Economic Research Institute of America), now located in Kingston, New York, publisher of the Trends Journal which forecasts and analyzes business, socioeconomic, political, and other trends.