CommSec’s James Gruber breaks down overnight losses in US markets following a sell-off in tech stocks. “The US ended lower overnight. The S&P 500 fell 0.7 per cent, and it was mainly down to a tech sell-off,” Mr Gruber told News24. “Commodities were mostly lower, oil was slightly higher, but copper and aluminium fell on weak Chinese economic data.” Presented by CommSec.