Algorithmic Trading (AT) and High Frequency (HF) trading, which are responsible for over 70\% of US stocks trading volume, have greatly changed the microstructure dynamics of tick-by-tick stock data. In this paper we employ a hidden Markov model to examine how the intra-day dynamics of the stock...

This paper discusses descriptive statistics on U.S. equity Alternative Trading Systems (ATSs, some of which are referred to as “dark pools”). The paper is intended to inform public discussion of the role and regulation of ATSs. While ATSs operate markets similar in some ways to the...

We show that limited dealer participation in the market, coupled with an informational friction resulting from high frequency trading, can induce demand for liquidity to be upward sloping and strategic complementarities in traders' liquidity consumption decisions traders demand more liquidity...

The promotion of both market fairness and efficiency has long been a goal of securities market regulators worldwide. Accelerated digital disruption and abusive trading behaviors, such as the GameStop mania, prompt regulatory changes. It is unclear how this "democratization" of trading power...

Closing auction volume is steadily increasing on NYSE and Nasdaq, and now represents over 10% of trading volume. The NYSE closing auction design is highly advantageous to NYSE floor brokers, who have near-exclusive access to the auction from 3:50 pm to 4:00 pm. We show that closing auction...

We document that Algorithmic Traders (ATs) reduce analysts' stock coverage and the number of analyst research reports. This evidence reflects that ATs pre-empt trades on new information, which reduces non-AT investment-driven demand for analyst research. Consistently, the effects we document...

Modern Algorithmic Trading ("Algo") allows institutional investors and traders to liquidate or establish big security positions in a fully automated or low-touch manner. Most existing academic or industrial Algos focus on how to "slice" a big parent order into smaller child orders over a given...

We study a unique data set of all client trades that the six largest Canadian dealers sent to U.S. equity markets in 2014-2015. Contrary to the public perception, Canadian dealers use U.S. markets only lightly and send less than 5% of their $-volume to the U.S.; on 60% of security-day...

Recent regulation, mandating the clearing of credit default swaps (CDS) by a Central Clearing Counterparties (CCP), has rendered it's possible failure a serious threat to global nancial stability. This work investigates the potential failure of a CCP initiated by the default of a large dealer...