Shares of Rigetti Computing ( RGTI 2.47%) are skyrocketing on Thursday. The quantum computing start-up's stock surged 10.5% as of 2:50 p.m. ET and was up as much as 12.3% earlier in the day. The rise comes as the S&P 500 gained 1.3% and the Nasdaq Composite rose 1.8%.

President Donald Trump has floated cutting tariffs on China to 80% ahead of a weekend meeting as he looks to deescalate the trade war

The president's social media post could signal movement that would ease fears among consumers, businesses and the markets.