Retail gas prices surged as Hurricane Harvey forced refineries to shut down, leading to curtailed petroleum shipments. Higher gas prices cut into investors’ pockets, prompting them to move money from stocks to bonds. Each of the indexes listed here lost value last week, with the exception of the Global Dow, which posted a modest gain. Hurricanes Harvey and Irma, plus continued tensions between the United States and North Korea, didn’t help equities. The yield on 10-year Treasuries fell 11 basis points as prices rose.