If the US military invades Iran, what will happen to Bitcoin? Lessons from previous wars.

The market has begun to react to increased geopolitical risk. Some Polymarket insiders – who previously accurately predicted the timing of the Iran war – are now placing large bets on the possibility of a direct US military presence in Iran.

Now, investors are asking a more difficult question: what will happen to financial markets if the Iran conflict becomes a “war like Iraq in 2003”? History may offer a frame of reference – but it's not a simple answer.

How did financial markets react to the Iraq War in 2003?

Research on the 2003 Iraq War shows that US stocks had already reflected fears even before the war officially began.

In other words, the market was then "discounting war," as investors worried about how badly the conflict would worsen.

But as soon as the offensive campaign began and the worst-case scenario didn't materialize, this discount was gradually eliminated.

During the study period, the S&P 500 index rose by approximately 3.8%–4%, while oil prices fell by about $6.5–$7. This suggests that the market's reaction wasn't solely due to the war itself, but rather to the easing of uncertainty.

This study also found that a representative risk-free interest rate based on U.S. Treasury bonds fell by approximately 40 basis points as the probability of war increased.

This has supported the stock market, as low interest rates typically lead to higher stock valuations. It also shows that investors are still seeking safety.

The results by sector are also quite clear: The energy and defense sectors typically benefit first when wartime tensions rise, as investors expect increased profits from the oil and gas sector and higher military spending.

Conversely, sectors such as finance or technology are typically more heavily influenced by interest rates and economic growth expectations.

Russia and Ukraine presented a different macroeconomic scenario in 2022.

The market's reaction in 2022 was completely different. On the day Russia invaded Ukraine, US stocks fluctuated sharply but still closed higher.

The S&P 500 rose about 1.5%, while the Nasdaq surged a remarkable 3.3%, demonstrating that the market can reverse very quickly in a single session when pessimism becomes excessive.

At the same time, the yield on 10-year US Treasury bonds fell by about 3 basis points, to around 1.97%. This indicates that investors are shifting to bonds for safety, while also worrying about slowing economic growth.

Bitcoin, however, behaved quite differently. The Token plummeted during the initial market shock, falling to its lowest level in a month and losing approximately 7% amid a series of news reports about the conflict.

This is noteworthy because it shows that Bitcoin was then being traded as a high-risk asset, rather than a safe haven when people were extremely anxious.

Data on the cash flow of crypto investment funds during that period also showed extreme volatility, mainly stemming from news related to the war.

What do these events say about Bitcoin's "War Beta"?

The two examples above offer an important lesson. Bitcoin typically doesn't move like gold when a major war shock occurs in the early stages.

Instead, Bitcoin is often subject to sharp sell-offs as a high-risk asset, especially in the first 24 to 72 hours when bad news emerges.

However, stocks sometimes recover faster than expected, even during wartime. This happened in 2003 – when concerns gradually became clear, and also in 2022 – when a wave of selling was so intense that investors shifted their positions.

This creates a difficult situation for Bitcoin. If the new conflict continues, oil prices are likely to remain high, inflation will rise, bond yields will increase, and liquidation will tighten – all of which are typically unfavorable environments for speculative assets like Bitcoin.

If the market assesses the conflict as short-lived and well-controlled, Bitcoin could still fall first before recovering thanks to a "rally of resolution".

However, the recovery then depended on one factor: whether bond yields and overall financial conditions would stabilize again.

The key factor: yields, not news about war.

The biggest impact doesn't come directly from the war itself, but from what the war does to inflation and interest rates.

If there is a ground attack, the following scenarios are likely to occur:

• This is driving oil prices higher.
• Increases inflation expectations.
• This causes bond yields to rise.
• This could delay or cancel the Fed's interest rate cuts.

This combination tightens liquidation across the entire market.

And Bitcoin is very sensitive to liquidation.

What happens next: Three scenarios

If the US intervenes in Iran, Bitcoin's reaction will depend on how the market perceives that event .

1. Short-lived, manageable conflict: Bitcoin may experience a sharp drop initially, then stabilize or recover as the situation becomes clearer.

2. Prolonged War: Bitcoin could face continued downward pressure as bond yields remain high and liquidation remains tight.

3. Full-blown escalation: A greater likelihood of a sharp sell-off, stemming from the risk of prolonged inflation and global apprehension.

Conclude

Bitcoin doesn't react to wars in the way many people think.

Bitcoin will be affected by liquidation, interest rates, and macroeconomic pressures. If the land war causes interest rates to rise and delays monetary policy easing, the short-term outlook for the crypto market remains quite negative.

Currently, the signal is clear: escalating risk is increasing, and Bitcoin is trading exactly as it's going.