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Making Money While Blood Flows: Lessons from the World Wars

Exploring the financial implications of the World Wars, from market rebounds to the shift from gold to fiat currency and the real lessons for investors today.

James Park
March 24, 2026 3 min read
Making Money While Blood Flows: Lessons from the World Wars

Investors often recall the adage attributed to Baron Nathan Mayer Rothschild: "Buy when there’s blood in the streets." This phrase, which suggests that financial opportunities arise during times of crisis, has echoed through history, particularly during the tumultuous periods of the World Wars. However, a closer examination reveals the complexities and risks involved in such strategies.

World War I: Opportunities Amidst Chaos

The outbreak of World War I in July 1914 caused a significant financial panic, leading to the unprecedented closure of the London Stock Exchange for five months. As investors scrambled to secure their assets, many opted to sell stocks in favor of gold and currency, while others chose to wait out the uncertainty. The focus shifted from profit-making to survival.

When the American stock market reopened in December 1914, the Dow Jones index rebounded impressively, climbing over 88%. This recovery was largely driven by the U.S. becoming a key supplier of military goods and food to the Allies, benefiting factory owners and businesses in the war-related sectors. Companies like DuPont saw their profits soar dramatically, with net income jumping from $5 million in 1914 to $82 million by 1918.

Despite the apparent financial gains for some, the war also marked the first large-scale mobilization of public capital, with governments issuing bonds to fund military efforts. Unfortunately, in many countries, these bonds became worthless following defeats or revolutions, particularly in Russia, Germany, and Austria-Hungary.

The Shift from Gold to Fiat Currency

By the autumn of 1914, the realization that the war would not be a short affair prompted a shift away from the gold standard. Governments began printing money to cover expenses, leading to the era of fiat currency, where the value of money was based on trust in the state rather than gold reserves. This transition allowed for significant inflation and changes in economic power dynamics.

While the U.S. managed to maintain its gold standard and emerged as a leading global creditor, European nations faced mounting debts. The war highlighted the limitations of the gold standard during total mobilization and demonstrated that fiat currencies could sustain economies for extended periods, despite their inherent risks.

World War II: The Value of Basic Necessities

During World War II, gold retained its status but was no longer the sole anchor for financial stability. As governments imposed strict economic controls, ordinary citizens found that tangible goods such as food, fuel, and clothing became more valuable than currency. Rationing systems were established to manage scarcity, and basic resources became the primary medium of exchange.

In this environment, those who profited were often those closest to supply chains and government contracts. Companies like Boeing and General Motors thrived by converting civilian production for military needs. Financial institutions also benefited, with banks profiting from loans to allies and managing financial transactions.

While some individuals did manage to exploit wartime conditions for personal gain, these cases were exceptions rather than the rule. The broader narrative suggests that while wars may create short-term financial opportunities for a select few, the majority of people face hardship and loss.

Conclusion: The Reality of War Profits

In summary, while tales of profiting during wartime are compelling, they often mask the grim realities of global conflict. The economic gains seen by some during the World Wars were not universally applicable and came at significant costs to humanity. As history shows, investing during crises is fraught with risks that often outweigh potential rewards.