Keywords
market microstructure
transaction cost
liquidity
How to Cite
Abstract
In a stock exchange, the principal liquidity-related transaction costs are the
margin between bid and offer for smaller transactions, and the impact on price for larger ones. This article estimates both indicators, with intra-day data, following a reconstruction of the order book, and in Goyenko et al. (2009) and Hasbrouck (2009). Using the orders database on the Colombian stock exchange, an estimate is made of transaction costs for 15 representative shares. With a data-panel model, a direct relationship was shown to exist between liquidity, exchange activity and yield, and an inverse relationship with volatility. Likewise, there is a reduction of liquidity in November 2007, after Ecopetrol entered the stock exchange, and its shares came to represent a high proportion of exchange transactions.
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