Warren Buffett's letter will be released Saturday

OMAHA -- Buffett's shareholder letters are one of the best-read business documents released each year, and many companies use quotes from Buffett's writings in their own reports.

Spokeswoman Carrie Kizer said Monday that Buffett's letter and Berkshire's 2008 annual report will be posted online.

Investors will be interested to learn more about long-term derivatives Berkshire holds that are tied to the value of stock market indexes.

Berkshire owns furniture, carpet, jewelry and candy companies, restaurants, natural gas and corporate jet firms and has major investments in such companies as Coca-Cola and Wells Fargo.