Losses in technology and health-care stocks accounted for much of last week’s market drop. The tech-heavy Nasdaq and the small caps of the Russell 2000 suffered the largest declines, leading a week of high market volatility. Bank and industrial stocks also took a big hit last week. Oil prices rose on news that OPEC members agreed to cut back production next year. Uncertainty over the economy and a prolonged trade dispute between the United States and China seem to be prompting investors to capture any stock gains and invest in bonds and futures such as gold. The yield on 10-year Treasuries continued to drop as bond prices climbed with increased demand.