A stock market or equity market is a public entity (a loose network of economic transactions, not a physical facility or discrete entity) for the trading of company stock (shares) and derivatives at an agreed price; these are securities listed on a stock exchange as well as those only traded privately.

The size of the world stock market was estimated at about $36.6 trillion at the beginning of October 2008. The total world derivatives market has been estimated at about $791 trillion face or nominal value, 11 times the size of the entire world economy. The value of the derivatives market, because it is stated in terms of notional values, cannot be directly compared to a stock or a fixed income security, which traditionally refers to an actual value. Moreover, the vast majority of derivatives 'cancel' each other out (i.e., a derivative 'bet' on an event occurring is offset by a comparable derivative 'bet' on the event not occurring). Many such relatively illiquid securities are valued as marked to model, rather than an actual market price.

George Soros ( /ˈsɔroʊs/ or /ˈsɔrəs/;Hungarian: Soros György; Hungarian: [ˈʃoroʃ]; born August 12, 1930, as Schwartz György) is a Hungarian-American business magnate,investor, and philanthropist. He is the chairman of Soros Fund Management. Soros supports progressive-liberal causes. He is known as "The Man Who Broke the Bank of England" because of his US$1 billion in investment profits during the 1992 Black Wednesday UK currency crisis.

Between 1979 and 2011, Soros gave away over $8 billion to human rights, public health, and education causes. He played a significant role in the peaceful transition from communism to capitalism in Hungary (1984–89), and provided Europe's largest higher education endowment to Central European University in Budapest. Soros is also the chairman of the Open Society Institute.

Soros was born in Budapest, Hungary to a well-to-do, nonobservant Jewish family. His mother Elizabeth (also known as Erzebet), whom Tivadar married in 1924, came from a family that owned a thriving silk shop. His father Tivadar (also known as Teodoro) was a lawyer and had been a prisoner of war during and after World War I until he escaped from Russia and rejoined his family in Budapest. Tivadar was an Esperantist writer and taught George to speak Esperanto from birth. Soros later said that he grew up in a Jewish home and that his parents were cautious with their religious roots. Soros was thirteen years old in March 1944 when Nazi Germany occupied Hungary. Soros took a job with the Jewish Council, which had been established during the Nazi occupation of Hungary. Soros later described this time to writer Michael Lewis:

Michael Monroe Lewis (born October 15, 1960) is an American non-fiction author and financial journalist. His bestselling books include The Big Short: Inside the Doomsday Machine, Liar's Poker, The New New Thing, Moneyball: The Art of Winning an Unfair Game, The Blind Side: Evolution of a Game, Panic, Home Game: An Accidental Guide to Fatherhood and Boomerang. He was a contributing editor to Vanity Fair, 2009–present.

Lewis was born in New Orleans to corporate lawyer J. Thomas Lewis and community activist Diana Monroe Lewis. He attended the college preparatory Isidore Newman School in New Orleans. He attended Princeton University where he received a BA degree (cum laude) in Art History in 1982 and was a member of the Ivy Club.

He went on to work with New York art dealer Daniel Wildenstein. He enrolled in the London School of Economics, and received his MA degree in Economics in 1985. Lewis was hired by Salomon Brothers and moved to New York for their training program. He worked at their London office as a bond salesman. He resigned to write Liar's Poker and become a financial journalist.

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."