The Impact of Latency Sensitive Trading on High Frequency Arbitrage Opportunities

Classical economic theory suggests that excess returns should be competed away as new participants enter the market. This is especially true for the profits from riskless arbitrage. Yet, there is conflicting evidence in the financial economic literature over whether high frequency trading (HFT) profits, in general, (Baron et al [2012]) and arbitrage profits, in particular (Budish et al [2013] and Chaboud et al [2013]), decline as high frequency or other algorithmic trading increases. There are important public policy implications for market microstructure and the social value of investments by HFT firms in being faster if arbitrage profit opportunities persist (in the absence of limits to arbitrage). There are several different strategies that high frequency and other latency sensitive traders engage in. These include: index arbitrage; spread arbitrage/market making; and correlated arbitrage among others. This study focuses on only one - index arbitrage. Specifically, it examines whether the duration, frequency and profitability of potential arbitrage opportunities between the Australian Securities Exchange (ASX) Share Price Index (SPI) futures contract and the exchange traded fund (ETF), STW, have changed as the number of HFT firms (or intensity of HFT activity) has increased, since the ASX's introduction of co-location services in February 2012. In addition, we use estimated potential arbitrage profits and compare them to the cost of being co-located to determine the value of minimum latency. Not surprisingly, we find the frequency and profitability of potential arbitrage opportunities are greater during volatile and high turnover periods - other things equal. We examine the increased competition in high frequency trading by identifying the number of ‘cabinets' co-located in the ASX's liquidity center. With increased HFT connections, we observe increasing value, frequency and duration of index arbitrage profit opportunities. Our results are robust to the inclusion of transaction costs. We conclude that the activity of disruptive HFT outweighs the activity of index arbitrage HFTs