U.S. stock futures are suggesting modest losses at the open as they take their lead from overseas markets. Chinese stocks fell nearly 3% on concerns of widespread margin calls while its currency fell to its lowest level since January 2017. U.S. investors will be watching the earnings reports, Philadelphia Fed Survey, initial and continuing jobless claims data, the leading economic indicators index, and the weekly EIA natural gas inventory report. In pre-market trading, Dow futures are 16 points below fair value, Nasdaq futures are 11 points below fair value and S&P futures are 5 points below fair value.