Investor sentiment is staging a modest comeback after a tech sector tumble, thanks to the buzz around Chinese AI upstart, DeepSeek. This newfound optimism nudged US equity futures upwards in pre-market trading on Tuesday. The Dow Jones Industrial Average futures remained flat, while the S&P 500 and Nasdaq futures both enjoyed a slightly more robust rise of 0.3%. This comes on the heels of a dip in the S&P 500 and Nasdaq the day before, triggered by DeepSeek's meteoric ascent. The startup has unveiled an open-source AI model that can run on less-advanced chips, shaking up the tech landscape and keeping investors on their toes.