A new year is around the corner, and artificial intelligence is likely to remain a driving force of stock market returns.With a little over three months remaining in 2025, now might be a good time to think about making some portfolio adjustments ahead of the new year. Artificial intelligence (AI) is currently a key driver of stock market returns, and we could still be in the early innings of this tech revolution, so investors who lack exposure might want to make some moves.Purchasing just one or two exchang ...