In Europe, the pound crisis and Italian lira crisis. In the early 1990s, in order to cooperate with the linked exchange rate within Europe, Soros artificially fixed the exchange rate of the British pound at a high level, which triggered an attack from international currency speculators. Quantum Fund took the lead in launching an attack, selling pounds on a large scale in the market and buying German marks. Although the Bank of England made great efforts to sell Deutsche Mark to buy the pound and cooperate with it to raise interest rates, it was still defeated by the attack of Quantum Fund, and the pound was forced to withdraw from the European currency exchange rate system and float freely. In just 1 month, the exchange rate of the pound fell by 20%, and the quantum fund made huge gains of hundreds of millions of dollars in this pound crisis. Prior to this, the Italian lira suffered the same fate, and the Quantum Fund also played the leading role.

In the United States, Mexico financial crisis. 1994 Soros quantum fund attacked Mexican peso. Before 1994, the healthy growth of Mexico's economy was based on excessive dependence on short-and medium-term foreign loans. In order to control domestic inflation, the peso exchange rate is overvalued and pegged to the US dollar. The peso attack launched by Quantum Fund made Mexico's foreign exchange reserves exhausted in a short time, so it had to abandon its peg to the US dollar and float freely, which led to the collapse of the Mexican peso and the domestic stock market. Quantum Fund made a big profit in this crisis.

In Asia, the financial crisis in Southeast Asia began with 1997. Mexico, Thailand, Malaysia, South Korea and many other Southeast Asian countries, such as 1994, have long relied on short-term and medium-term foreign debts to maintain the balance of international payments, with high exchange rates, and most of them maintain fixed or linked exchange rates with the US dollar or a basket of currencies, which provides a good opportunity for international speculative funds. Quantum fund played the role of sniper, starting with a large number of short selling of Thai baht, forcing Thailand to abandon its long-term fixed exchange rate pegged to the US dollar and float freely, thus triggering an unprecedented crisis in Thailand's financial market. The crisis quickly spread to all countries and regions in Southeast Asia where currencies are freely convertible, forcing all major currencies in Southeast Asia to depreciate sharply in a short time. The collapse of the monetary system and stock market in Southeast Asian countries, as well as the huge foreign investment pressure and domestic inflation brought about by it, cast a shadow over the economic development of this region.