Key PointsThe stock market had a volatile start to 2026, but every major U.S. index is in the green, led by the Nasdaq-100. However, investors who bought the iShares Expanded Tech Sector ETF at the start of the year would be outperforming the overall market thanks to its 27% return. The iShares ETF invests in North American companies across a dozen different areas of the tech industry, with large holdings in AI giants like Nvidia, Broadcom, Alph…