“Fast market” refers to situations where the financial markets experience exceptional price movements and high volatility over relatively short periods of time, which can result in a sudden increase in risk and uncertainty, possibly affecting issuers’ hedging abilities.
For example, these situations may include:
(a) financial uncertainty - exceptionally volatile market conditions linked to financial uncertainty, for example, the period following Lehman Brothers’ bankruptcy in September 2008 and the “flash crash” of 6 May 2010, when the Dow Jones Industrial Average suffered its worst intra-day point loss; and
(b) underlying uncertainty - the occurrence of events causing the intraday market price of the underlying stock or index to experience significant fluctuations and/or a material reduction in liquidity of the underlying, for example, Japan’s earthquake on 11 March 2011 which resulted in a drastic fall in Nikkei index in the immediately following period and fluctuation in prices of the related CBBCs.
These are just possible examples of fast market events. Depending on circumstances, some market events may trigger a VCM which may possibly result in a fast market.
It is generally more difficult to provide quotes momentarily when the price of the underlying asset is changing rapidly within a short period of time.
VCM is a dynamic price limit model applied at the individual instrument level. Where the price deviates more than a predefined percentage within a specific time frame, the instrument will trade within band during a 5-minute cooling off period. This provides a window allowing market participants to reassess their strategies, if necessary. It also helps to re-establish an orderly market during volatile market situations.