U.S. President Donald Trump's policies that have rattled stocks around the world are benefiting Australian shipbuilder Austal, analysts said on Wednesday. Shares of the company, which supplies defence and commercial vessels to the Australian and U.S. navies among other clients, surged 35% in the three months ending March, clocking their best quarterly gains in nearly two years since June 2023. The surge in Austal's shares comes amid Trump's call asking Australia and other U.S. security allies to increase defence spending.