Both Alphabet (NASDAQ: GOOG) (NASDAQ: GOOGL) and Amazon (NASDAQ: AMZN) fell following their Q4 results over the past few weeks. It wasn't for the strength each displayed in Q4; rather, it was because each company plans to spend a significant amount of money on artificial intelligence (AI) infrastructure in 2025.

Jim Lebenthal, Chief Equity Strategist at Cerity Partners, joins CNBC's "Halftime Report" to detail his latest portfolio moves.

On Feb. 6, Pinterest reported financial results for the fourth quarter of 2024 -- a key catalyst in the stock's 34% year-to-date gains. Its Q4 revenue was up a strong 18%, which is why investors are upbeat. But the biggest part of this business is also the least monetized part. And that's where Amazon and Alphabet come into this promising story.

Both Alphabet (NASDAQ: GOOG) (NASDAQ: GOOGL) and Amazon (NASDAQ: AMZN) fell following their Q4 results over the past few weeks. It wasn't for the strength each displayed in Q4; rather, it was ...

Amazon and Alphabet are both spending heavily on computing infrastructure. Cloud computing has the potential to be a massive part of both companies' businesses. Some investors would rather see ...