[ad_1] <br><img src="https://fortune.com/img-assets/wp-content/uploads/2024/12/GettyImages-2189987132-e1735519932522.jpg?w=2048" /><br>The S&P 500 is heading to a 25% gain in 2024, capping the strongest back-to-back annual runs since the dot-com bubble of the late 1990s. <a href="https://fortune.com/2024/12/29/sp500-2024-rally-wall-street-forecasters-2025-stock-market-outlook/">Read More</a> <br><a href="https://fortune.com/2024/12/29/sp500-2024-rally-wall-street-forecasters-2025-stock-market-outlook/">Read More </a>