Key Takeaways How to find some of the best Zacks Rank #1 (Strong Buy) stocks to buy in June. Soaring fintech stock OppFi offers huge upside and great value.The S&P 500 jumped 6% last month for its best May since 1990 and its strongest monthly performance since November 2023. Meanwhile, the Nasdaq surged nearly 10% as Wall Street dove headfirst back into beaten-down technology stocks.The bulls pressed their advantage to start June, pushing the Nasdaq up 0.7% higher on Monday and 1% through midday trading Tu ...