New Delhi, July 7 -- US stock futures pointed to a weak start on Tuesday as artificial intelligence (AI)-related stocks came under pressure after investors reacted to Samsung Electronics' earnings, raising fresh concerns over the sustainability of the sector's sharp rally.

Futures tied to the S&P 500 were down 0.2%, while Dow Jones Industrial Average futures edged 0.1% higher. Nasdaq futures fell 0.8%, indicating that Monday's rebound on Wall Street was losing momentum.

In the previous session, all three major US indices ended in positive territory, with the Dow Jones Industrial Average closing above the 53,000 mark for the first time.

Samsung, the world's largest memory chipmaker by market value, tumbled 7.5% in Seoul despite reportin...