The Nasdaq was lower on Friday with pressure from Apple Inc while the dollar gained and U.S. Treasury yields rose as investors shied away from riskier bets. The mood was jittery as the gift-buying season kicked off on a scheduled half-day for U.S. markets after the Thanksgiving holiday, with investors watching out for signs of weakness in consumer spending with inflation still soaring. While shoppers often turn out in record numbers with hopes of Black Friday discounts, so far, crowds were thin outside stores on what is historically the busiest shopping day. "It's a very competitive environment for retail, both...