1 code implementation • 25 Mar 2024 • Zehan Li, Jianfei Zhang, Chuantao Yin, Yuanxin Ouyang, Wenge Rong
Retrieval-based code question answering seeks to match user queries in natural language to relevant code snippets.
no code implementations • 20 Nov 2023 • Namid R. Stillman, Rory Baggott, Justin Lyon, Jianfei Zhang, Dingqiu Zhu, Tao Chen, Perukrishnen Vytelingum
The ability to construct a realistic simulator of financial exchanges, including reproducing the dynamics of the limit order book, can give insight into many counterfactual scenarios, such as a flash crash, a margin call, or changes in macroeconomic outlook.
no code implementations • 11 Apr 2023 • Jianfei Zhang, Mathieu Rosenbaum
Given the huge amount of news articles published each day, most of which are neutral, we present a systematic news screening method to identify the ``true'' impactful ones, aiming for more effective development of news sentiment learning methods.
no code implementations • 20 Dec 2022 • Mathieu Rosenbaum, Jianfei Zhang
Given the promising results on joint modeling of SPX/VIX smiles of the recently introduced quadratic rough Heston model, we consider a multi-asset market making problem on SPX and its derivatives, e. g. VIX futures, SPX and VIX options.
1 code implementation • 1 Nov 2022 • Jianfei Zhang, Jun Bai, Chenghua Lin, Yanmeng Wang, Wenge Rong
There are effective ways proposed to prevent posterior collapse in VAEs, but we observe that they in essence make trade-offs between posterior collapse and hole problem, i. e., mismatch between the aggregated posterior distribution and the prior distribution.
no code implementations • 28 Jun 2022 • Mathieu Rosenbaum, Jianfei Zhang
We train an LSTM network based on a pooled dataset made of hundreds of liquid stocks aiming to forecast the next daily realized volatility for all stocks.
no code implementations • Findings (EMNLP) 2021 • Yanmeng Wang, Jun Bai, Ye Wang, Jianfei Zhang, Wenge Rong, Zongcheng Ji, Shaojun Wang, Jing Xiao
To keep independent encoding of questions and answers during inference stage, variational auto-encoder is further introduced to reconstruct answers (questions) from question (answer) embeddings as an auxiliary task to enhance QA interaction in representation learning in training stage.
no code implementations • 4 Jul 2021 • Mathieu Rosenbaum, Jianfei Zhang
The quadratic rough Heston model provides a natural way to encode Zumbach effect in the rough volatility paradigm.