We study how wars and explicit military threats affect financial markets worldwide. We leverage 250,000 monthly price observations on sovereign bonds back to 1822 to create a new long-run external currency bond index for up to 90 countries-the EXBI. We combine the EXBI with new data on wars and document large effects of conflict risk on investor returns and sovereign borrowing costs. In a global external bond portfolio, a one-standard-deviation war shock lowers investor returns by about five percentage points within a year. At the country level, wars at home generate sharp investor losses and increase sovereign default risk. Also war threats move financial markets. They depress bond prices in threatened states, but not in threatening ones. These results show that conflict risk, both realized and anticipated, is a systematic driver of sovereign debt markets and that war threats are a channel for geoeconomic coercion.
Working paper