Wg AI A 25% regulation for share buybacks refers to a daily limit that many companies must follow, allowing them to repurchase up to 25% of the average daily trading volume of their shares from the previous 20 business days. This is a common rule in many jurisdictions, such as under the UK's implementation of the EU's Market Abuse Regulation (MAR), but it is distinct from another common rule that prohibits a company from buying back more than 25% of its paid-up capital and free reserves through a single buyback program, as seen in India's regulations.