American financier george soros runs five hedge funds with different styles. Among them, Quantum Fund is the largest one and one of several large hedge funds in the world. Quantum Fund was originally founded by Soros and another famous hedge fund, jim rogers, in the late 1960s. At first, its assets were only $4 million. The fund was established in new york, but the investors are all non-American foreign investors, thus evading the supervision of the US Securities and Exchange Commission. Quantum funds invest in commodities, foreign exchange, stocks and bonds, and make extensive use of financial derivatives and leveraged financing to engage in all-round international financial operations. Soros, with his extraordinary analytical ability and courage, guided the quantum fund to grow and develop again and again in the world financial market. He has accurately predicted the extraordinary growth potential of an industry and a company for many times, and thus obtained extraordinary returns in the rising process of these stocks. Even in the bear market where the market fell, Soros made a lot of money with his superb short-selling skills. After less than 30 years of operation, by the end of 1997, the quantum fund has grown into a giant fund with total assets of nearly 6 billion US dollars. By the end of 1996, the 10000 injected by Quantum Fund had increased to $300 million, an increase of 30,000 times.

Soros became a hot figure in the international financial community because he launched several large-scale currency sniper wars with the help of quantum funds in the mid-1990s. With its abundant financial resources and fierce style, Quantum Fund has been making waves in the international currency market since the 1990s, often attacking currencies with weak foundations and succeeding repeatedly.

Although the quantum fund has only $6 billion in assets, it has become a decisive force in the international financial market because it can obtain the investment effect equivalent to tens of billions or even hundreds of billions of funds through leveraged financing and other means when needed. At the same time, due to Soros's fame, the whereabouts and betting direction of Quantum Fund are followed by large-scale international hot money. Therefore, every move of quantum fund often plays a key role in the fluctuation trend of a country's currency. Hedge funds often attack a currency by short-selling it on a large scale in the forward and futures and options markets, thus causing depreciation pressure on the currency. For countries with foreign exchange reserves, after futile market intervention, the only way left is often to devalue their currencies, so that short hedge funds can make a lot of money. Soros and his quantum fund were directly responsible for several serious currency crises in the 1990s.