The Price of War: Modeling the Global Economic Cost of a Taiwan Conflict
The global economic cost of a Taiwan Strait military conflict has been modeled by institutions ranging from the Rhodium Group to Bloomberg Economics to various government think tanks and war gaming centers. The estimates vary widely because the scenarios they model vary widely — a short, limited conflict produces different numbers than a prolonged blockade, which produces different numbers than a full-scale invasion with global power intervention. What the models agree on is that the numbers are very large, larger than any economic disruption since the Second World War, and large enough that they constitute an argument for prevention that is separate from any moral or political case for Taiwan’s defense.
The Bloomberg Economics scenario modeling published in 2023 estimated that a full-scale Taiwan conflict could cost the global economy approximately ten trillion dollars in its first year — a figure that represents roughly ten percent of global GDP and that exceeds the combined economic damage of the 2008-2009 financial crisis and the COVID pandemic. The scenario drove this estimate through three main channels: semiconductor supply disruption affecting every industry that depends on advanced chips, trade disruption in one of the world’s most active maritime regions, and financial market shock as the prospect of US-China military confrontation repriced risk across global asset classes.
The semiconductor channel is the most direct and the most immediately quantifiable. Global semiconductor revenue is approximately half a trillion dollars annually, and the goods that semiconductors enable — consumer electronics, automotive, industrial equipment, communications infrastructure, defense systems — represent a multiple of that figure in final output. A Taiwan conflict that halted TSMC’s production would create chip shortages within weeks that would begin shutting down production lines in industries far removed from the immediate conflict. The automotive industry, which has less chip inventory than consumer electronics companies, would feel the shortage most quickly. The defense industrial base, which needs advanced chips for precision guidance systems, communications, and electronic warfare, would face longer-term production constraints that affect military readiness in ways that outlast the immediate conflict.
The financial market channel operates through the anticipation of the other channels rather than their direct impact. Markets price future expected cash flows, and a scenario in which the global economy faces a significant probability of the supply disruptions described above produces immediate repricing before any actual disruption has occurred. The Taiwan risk premium — the discount that investors apply to assets exposed to a Taiwan conflict scenario — has been growing as analysts have incorporated higher conflict probability into their models. A crisis that moved those probability estimates sharply upward would produce financial market movements that impose real economic costs through tighter credit conditions, lower investment, and wealth effects on consumer spending in economies with large equity market exposure.
The trade disruption channel has both direct and indirect components. The Taiwan Strait is not Hormuz — it does not carry the same share of global energy trade — but it carries a significant proportion of the container shipping between East Asia and the rest of the world. A closure of the strait for military reasons would reroute this traffic, adding transit time, increasing shipping costs, and reducing the efficiency of supply chains that have been optimized around normal routing. The indirect component is the disruption to Chinese manufacturing exports that would result from a conflict involving China’s own economy — China is the factory for a wide range of goods that global consumers and producers depend on, and a China at war produces and exports less of everything.
The models are necessarily incomplete. They cannot quantify the cost of prolonged uncertainty — the investment that is not made, the supply chains that are permanently diversified at higher cost, the military spending that is permanently elevated as governments respond to demonstrated risk. These costs, accumulated over years following a conflict that demonstrates the fragility of the current order, may exceed the immediate economic damage that the models estimate.
Ten trillion dollars is a large number. It does not include the human cost, the political cost, or the cost to the international order that the conflict would produce. It is the minimum price of the scenario that everyone is trying to prevent and that not everyone is working hard enough to prevent.