Billionaire investor Warren Buffett advises putting extra cash into the stock market with potential for soaring stocks. Carnival (NYSE: CCL) is trading at a significant discount despite revenue growth, operating profit, and debt reduction. Operating income surged in the second quarter, with expected pricing improvements for 2025. Roku (NASDAQ: ROKU) has 81 million households using its streaming platform, driving record revenue and free cash flows. The stock is discounted and trading at an attractive price-to-free-cash-flow multiple of 20. Consider investing in these stocks for potential growth over the next few years.

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