The buyback glossary.

Plain-English, source-citable definitions of every concept that matters for tracking US corporate share repurchases — from SEC Rule 10b-18 to Stress Capital Buffer constraints on bank buybacks.

8 terms · Last updated 2026-06-19 · All entries link to SEC primary sources

A

Accelerated Share Repurchase #

a.k.a. ASR, Accelerated Buyback

A structured share-repurchase transaction in which a company contracts with an investment bank to retire a large block of stock immediately, with final share-count and price settled later based on a volume-weighted average price.

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B

Buyback Authorization #

a.k.a. Repurchase Authorization, Repurchase Program, Buyback Program

A board-of-directors resolution authorizing management to repurchase up to a specified dollar value or share count of the company's own stock over a defined or open-ended period.

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F

Form 8-K #

a.k.a. 8-K, Current Report

A current-event SEC report public companies must file within four business days of material corporate events, including the announcement of a new share-repurchase authorization.

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Form 10-Q #

a.k.a. 10-Q, Quarterly Report

The SEC quarterly report public companies must file within 40–45 days of quarter-end. Includes the issuer-purchase table that discloses month-by-month buyback execution under Rule 10b-18.

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P

Payout Ratio #

a.k.a. Total Payout Ratio, Shareholder Yield

The share of a company's earnings or free cash flow returned to shareholders via dividends plus share repurchases. A key signal of capital-allocation discipline and management's view on internal reinvestment opportunities.

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R

Rule 10b-18 #

a.k.a. SEC Rule 10b-18, 10b-18, Safe Harbor for Issuer Repurchases

An SEC safe harbor that protects issuers from market manipulation liability when they buy back their own stock under four conditions: single broker, time-of-day restrictions, price limits, and volume caps.

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S

Share Repurchase #

a.k.a. Stock Buyback, Share Buyback, Stock Repurchase

A capital-allocation action in which a public company uses its cash to buy back its own shares from the open market or via tender offer, reducing total shares outstanding and returning capital to remaining shareholders.

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Stress Capital Buffer #

a.k.a. SCB, Stress Capital Buffer Requirement

A regulatory capital requirement imposed on US bank holding companies based on Federal Reserve stress-test results. SCB directly constrains how much cash large banks can return to shareholders via dividends and buybacks.

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