Search Results for author: Kentaro Imajo

Found 8 papers, 3 papers with code

Construction of Domain-specified Japanese Large Language Model for Finance through Continual Pre-training

no code implementations16 Apr 2024 Masanori Hirano, Kentaro Imajo

After continual pre-training using the datasets and the base model, the tuned model performed better than the original model on the Japanese financial benchmarks.

Language Modelling Large Language Model

Adversarial Deep Hedging: Learning to Hedge without Price Process Modeling

no code implementations25 Jul 2023 Masanori Hirano, Kentaro Minami, Kentaro Imajo

In this framework, a hedger and a generator, which respectively model the underlying asset process and the underlying asset process, are trained in an adversarial manner.

Efficient Learning of Nested Deep Hedging using Multiple Options

no code implementations20 May 2023 Masanori Hirano, Kentaro Imajo, Kentaro Minami, Takuya Shimada

That is, we develop a fully-deep approach of deep hedging in which the hedging instruments are also priced by deep neural networks that are aware of frictions.

Theoretically Motivated Data Augmentation and Regularization for Portfolio Construction

1 code implementation8 Jun 2021 Liu Ziyin, Kentaro Minami, Kentaro Imajo

The task we consider is portfolio construction in a speculative market, a fundamental problem in modern finance.

Data Augmentation

No-Transaction Band Network: A Neural Network Architecture for Efficient Deep Hedging

2 code implementations2 Mar 2021 Shota Imaki, Kentaro Imajo, Katsuya Ito, Kentaro Minami, Kei Nakagawa

Deep hedging (Buehler et al. 2019) is a versatile framework to compute the optimal hedging strategy of derivatives in incomplete markets.

Deep Portfolio Optimization via Distributional Prediction of Residual Factors

no code implementations14 Dec 2020 Kentaro Imajo, Kentaro Minami, Katsuya Ito, Kei Nakagawa

In this study, we propose a novel method of constructing a portfolio based on predicting the distribution of a financial quantity called residual factors, which is known to be generally useful for hedging the risk exposure to common market factors.

BIG-bench Machine Learning Portfolio Optimization

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