Shares of Yahoo Inc. rallied Wednesday a day after the Web portal posted better-than-expected results, including a re-accelerated growth in Alibaba, the Chinese Internet powerhouse in which it owns a 24% stake. Yahoo was up more than 6% in early trades. Also rallying were shares of Google Inc., which were up more than 1%. Intel also climbed 1% after the company reported slightly better-than-anticipated gross profit margin. On the downside, shares of Twitter were down 2%. The Nasdaq Composite Index gained 31 points to 4,065. The Philadelphia Semiconductor Index was off a fraction.