Axis Securities has selected small-cap stocks that could be the best picks for investors' portfolios in June. The brokerage firm recommends buying Mahindra CIE Automotive, Praj Industries, CreditAccess Grameen, and PNC Infratech, among others. The firm said its May 2023 top picks outperformed both Sensex and Nifty, which gained by 2.47% and 2.60%, respectively. Axis Securities' top picks basket delivered an impressive 25% return in the last one year.