Berkshire Hathaway triples Alphabet stake and invests in Delta and Macy’s under new CEO

Stock markets worldwide drop from records as worries about oil prices rattle the bond market

New Virginia law banning ‘assault firearms’ prompts quick lawsuits from gun-rights groups

Trump weighs Taiwan arms package after summit aimed at steadying US-China ties

Tech CEOs summoned to Congress for another hearing on social media’s risks for children

Antipoverty advocate Global Citizen hopes the World Cup halftime show drives money for education