Mumbai, Aug. 8 -- Tech-heavy Nasdaq climbed 73.27 points (0.4%) to 21,242.70, the S&P 500 edged down 5.06 points (0.1%) to 6,340.00 and the Dow fell 224.48 points (0.5%) to 43,968.64.

Wall Street opened strong after President Donald Trump announced a 100% tariff on imported semiconductors and chips, exempting companies manufacturing in the U.S. Apple gained 3.2% as CEO Tim Cook confirmed a $100 billion U.S. investment, but gains faded amid concerns over broader trade policy impacts. Intel fell 3% after Trump urged CEO Lip Bu Tan to resign, calling him highly conflicted.

Labor Department released a report showing first-time claims for U.S. unemployment benefits rose by more than expected in the week ended August 2nd. It also said initial...