1. Capital Requirements: ₹15,000 vs ₹1,00,000+
Mainboard IPOs cater to mainstream retail investors with lot ticket sizes kept deliberately between ₹14,000 and ₹15,000. Anyone with a demat account and modest savings can participate.
In contrast, SME IPOs listed on BSE SME or NSE Emerge mandate a minimum application threshold exceeding ₹1,00,000 to ₹1,40,000 to ensure only risk-tolerant participants enter high-volatility microcaps.
2. Post-Listing Trading & Liquidity Concerns
On the mainboard, you can buy or sell single shares after listing. SME shares can only be bought or sold in entire lots. If a stock enters lower circuit, exiting an illiquid SME position can take several sessions.
3. Underwriting & Merchant Banker Regulations
SME issues are 100% underwritten, with the lead merchant banker required to underwrite at least 15% on their own balance sheet, providing a safety net for nascent enterprises.