Osaka Securities Exchange Co., Ltd. (株式会社大阪証券取引所, Kabushiki-gaisha Ōsaka Shōken Torihikijo, OSE) is the second largest securities exchange in Japan, in terms of amount of business handled.
As of 31 December 2007, the Osaka Securities Exchange had 477 listed companies with a combined market capitalization of $212 billion. The Nikkei 225 Futures, introduced at the Osaka Securities Exchange in 1988, is now an internationally recognized futures index. In contrast to the Tokyo Stock Exchange, which mainly deals in spot trading, the Osaka Securities Exchange's strength is in derivative products. The OSE is the leading Derivatives Exchange in Japan and it was the largest futures market in the world in 1990 and 1991. According to statistics from 2003, the Osaka Securities Exchange handled 59% of the stock price index futures market in Japan, and almost 100% of trading in the options market. Osaka Securities Exchange Co., which listed on its Hercules market for startups in April 2004 is the only Japanese securities exchange which went public on its own market.
In July 2006 OSE launched their newest futures contract the Nikkei 225 mini which is one tenth of the size of the original Nikkei 225 Futures contract and highly popular among Japanese individual investors.
In September 2007 OSE established evening session for Stock Index Futures and Options.The trading hours is from 16:30 to 19:00 (JST. 7:30-10:00 in UTC).In July 2012 a planned merger with the Tokyo Stock Exchange was approved by the Japan Fair Trade Commission. Today, despite its name, trading for Osaka Stock Exchange takes place in Tokyo.