3 stocks for investors looking for passive income and upside potential.The S&P 500 (SNPINDEX: ^GSPC) is on track to have an above-average year in 2025 after a rapid recovery from a steep sell-off in April. The impressive performance comes on top of back-to-back gains of more than 20% in 2023 and 2024.Needless to say, the S&P 500 is running hot, so investors may want to take extra care to ensure they are targeting quality companies that can justify their valuations with future earnings growth.Here's why thes ...