We utilize seventeen years of comprehensive daily portfolio and trading data identified at the individual investor level, to analyze the relative trading performance of the entire universe of households, all domestic financial institutions and all foreign institutions in the Finnish market. We...

We study the impact of post-trade disclosure of broker IDs on market efficiency, trading volume and bid-ask spreads in a unique South Korean experiment. We find that simply revealing the ex-post order flow of the major brokers to the entire market improves market efficiency to the level of a...