A specific US federal tax exemption that allows investors in Qualified Small Business (defined as under $50M capitalization) for some capital gains tax exemption (up to 100%) based on how long the stock is held (minimum 5 years) up to $10mm. This provision is a frequent target of proposed tax law changes, though (as of January 2023) it is still in place.

What are the benefits of holding for 7 years versus 5 with regard to QSBS?