Â· This equates to an average cost saving of $18,000 for every USD $10million of Japanese equities traded in January 2010 compared to December 2009. The reduction in costs was most significant for large cap Japan stocks with a 46% decrease, followed by mid caps at 27% and small caps at 14%.
Â· Costs had been trending downwards in the aftermath of the global financial crisis, but this monthly drop is sharper and breaks from the trend line. This may be largely attributable to changes in market structure initiated by the Arrowhead project, in particular: average spreads on the TSE narrowing over 15% from 24.4 in Dec 09 to 20.7 in Jan 2010; and a 16.5% uptick in average daily turnover December to January.
Â· This was accompanied by a 30%+ fall in typical trade size (both volume and value) amongst the most liquid stocks (Nikkei 225). This trend is reflective of developments seen historically in other global markets, for example the U.S.: as electronic trading develops, spreads narrow and automation on trading venues becomes faster. This results in a reduction in average trade size, though total volumes traded remain high or increase.