This Note examines the SEC's safe harbor for issuer stock repurchases (buybacks) under Rule 10b-18 of the Exchange Act. In particular, this Note summarizes the purchase, timing, price, and volume requirements that must be met in order to comply with Rule 10b-18. It also identifies the types of securities covered by Rule 10b-18. This Note identifies other considerations for an issuer when conducting a stock buyback program, including the application of Rule 10b-18 to repurchases outside the US, and the interaction of the rule with other federal securities laws.