In this paper, based on cliometric methodology we use new historical data on the most popular stocks traded at the İstanbul bourse between 1910 and 1914, to examine the effect of wars on stock market prices. During this period, the Ottoman Empire was involved in the Turco-Italian and the Balkan wars, leading to massive land losses and risks for the companies before the First World War. The data are manually collected from the available volumes of a daily Ottoman newspaper, Tanin. Our findings are surprising, as we observe only a temporary and small drop in stock prices, indicating little perceived risk by stock investors of the İstanbul bourse