This is one statistic Donald Trump may not want to tweet about: The S&P 500 Index is stuck in its longest losing streak of his presidency.

The benchmark equity gauge closed down 3.3 percent on Wednesday, extending its losses over five days to 4.8 percent, as fresh concern about the impact of the trade war with China roiled technology and industrial shares.

The Dow Jones Industrial Average shed 3.2 percent, while the Nasdaq Composite Index lost 4.1 percent in the worst day for U.S. stocks since February.