In this paper, we explore potential uses of generative AI models, such as ChatGPT, for investment portfolio selection. Trusting investment advice from Generative Pre-Trained Transformer (GPT) models is a challenge due to model "hallucinations", necessitating careful verification and validation...

Exchanges, including Nasdaq’s Extended Trading Close introduced in 2022, have implemented the after-hour fixed-price trading (hereinafter referred to as the fixed-price session) to enhance liquidity. Although the fixed trading price eliminates temporary price impact, execution risk remains....

We propose a price impact model where changes in prices are purely driven by the order flow in the market. The stochastic price impact of market orders and the arrival rates of limit and market orders are functions of the market liquidity process which reflects the balance of the demand and...

Time horizon dimensions are added to asset pricing theory. Single period, static, arbitrage pricing theory (APT) describes single period risk with long horizon contributions in the frequency domain. Mean-reversion risks correspond to horizon variances. Mean-reversion risk is measured using the...

We suggest a simple practical method to combine the human and artificial intelligence to both learn best investment practices of fund managers, and provide recommendations to improve them. Our approach is based on a combination of Inverse Reinforcement Learning (IRL) and RL. First, the IRL...

We propose a class of execution algorithms that consists of a strategic layer and a speculative layer. The strategic layer is an optimal trading schedule that encodes the trader's objective, her tolerance to risk, and the impact of her own trades in the market. The schedule of the strategic...

Modern portfolio theory produces optimal portfolios from estimates of expected returns and a covariance matrix. Such optimal portfolios are efficient portfolios, that is they provide the maximum level of expected return for a given level of risk. We present a method for portfolio selection based...

Minimum market transparency requirements impose Hedge Fund (HF) managers to use the statement declared strategy in practice. However each declared strategy may actually lead to a multiplicity of implemented management decisions. Is then the actual strategy the same as the announced strategy? Can...

Point and Figure charting is one of the oldest practitioner techniques for analysing price movements in financial markets, yet has received almost no coverage in the academic finance literature. This paper empirically contributes to the existing trading rule literature by providing a methodology...

A barrier option is a derivative instrument whose payoff is dependent on the path of the underlying security up to maturity. We design a pricing system using Finite Differences to investigate the properties of and price options with exotic barrier features. The system determines the payoff,...