The term microcap stock (also micro-cap) is use to describe publicly traded companies which have a market capitalization of roughly US$250 million or less. The vast majority of U.S. stocks fall into this category, but they make up only a small fraction of the total stock market value. Most are traded on over the counter exchanges, and their prices are quoted on the OTC Bulletin Board (OTCBB) or the Pink Sheets. Larger, more established microcaps are often listed on the NASDAQ Small Cap or American Stock Exchange (AMEX). Other common exchanges for U.S. microcaps include the Alternative Investment Market (AIM) in London, the Toronto Venture Exchange, and the Frankfurt and Berlin stock exchanges. The AIM has become a popular alternative to listing on U.S. exchanges since the Sarbanes-Oxley Act of 2002 greatly increased the accounting and legal costs of a U.S. stock listing, which are disproportionately high for small companies.