The surprise tariff threat from President Trump exacerbated the earlier damage from the U.S.-China trade dispute. The Dow recorded its sixth straight down week with a 3% drop, while the S&P 500 sank 2.6% the Nasdaq Composite slipped 2.4%. The Russell 2000 was also under selling pressure, sliding 3.2% over the five sessions. U.S. Treasury yields resumed their steep slide, with the two-year yield tumbling 12 bps to 1.94% and the 10-year benchmark shedding 9 bps to 2.14%. Over in the energy market, U.S. WTI July crude oil crashed 5.5% to $53.30 per barrel in yet another piece of evidence of investor concerns on the global economy.