KODA’s full name is Knock Out Discount Accumulator, also known as Accumulator, which is translated as cumulative option in China. This is an extremely complex financial derivative product that can be linked to foreign exchange, stocks, oil futures, etc. The contract period is usually one year.

The original intention of KODA is to continuously accumulate long-term promising stocks under relatively stable market conditions. An exercise price lower than the current price allows investors to make more profits in addition to the increase in the underlying stock price, and its leverage also increases profit-making efforts.

The funds stored in the accounts of these customers who invest in Accumulator are not directly used to purchase stocks in the market. For example, Rong Zhijian, chairman of the board of directors of CITIC Pacific, signed his name on the resignation letter. CITIC Pacific's huge losses in this kind of financial derivatives exceeded 15 billion Hong Kong dollars, and it is still expanding. Country Garden's 2008 annual report revealed that it suffered a huge loss of RMB 1.2 billion from investing in financial derivatives.