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How GenAI-Powered Synthetic Data Is Reshaping Investment Workflows

by James Tait
August 26, 2025
in Investing
Reading Time: 6 mins read
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In at the moment’s data-driven funding atmosphere, the standard, availability, and specificity of information could make or break a technique. But funding professionals routinely face limitations: historic datasets could not seize rising dangers, different information is commonly incomplete or prohibitively costly, and open-source fashions and datasets are skewed towards main markets and English-language content material.

As companies search extra adaptable and forward-looking instruments, artificial information — significantly  when derived from generative AI (GenAI) — is rising as a strategic asset, providing new methods to simulate market eventualities, practice machine studying fashions, and backtest investing methods. This publish explores how GenAI-powered artificial information is reshaping funding workflows — from simulating asset correlations to enhancing sentiment fashions — and what practitioners have to know to judge its utility and limitations.

What precisely is artificial information, how is it generated by GenAI fashions, and why is it more and more related for funding use circumstances?

Take into account two widespread challenges. A portfolio supervisor seeking to optimize efficiency throughout various market regimes is constrained by historic information, which may’t account for “what-if” eventualities which have but to happen. Equally, a knowledge scientist monitoring sentiment in German-language information for small-cap shares could discover that almost all obtainable datasets are in English and targeted on large-cap firms, limiting each protection and relevance. In each circumstances, artificial information presents a sensible answer.


What Units GenAI Artificial Knowledge Aside—and Why It Issues Now

Artificial information refers to artificially generated datasets that replicate the statistical properties of real-world information. Whereas the idea is just not new — strategies like Monte Carlo simulation and bootstrapping have lengthy supported monetary evaluation — what’s modified is the how.

GenAI refers to a category of deep-learning fashions able to producing high-fidelity artificial information throughout modalities reminiscent of textual content, tabular, picture, and time-series. Not like conventional strategies, GenAI fashions be taught complicated real-world distributions immediately from information, eliminating the necessity for inflexible assumptions in regards to the underlying generative course of. This functionality opens up highly effective use circumstances in funding administration, particularly in areas the place actual information is scarce, complicated, incomplete, or constrained by price, language, or regulation.

Frequent GenAI Fashions

There are several types of GenAI fashions. Variational autoencoders (VAEs), generative adversarial networks (GANs), diffusion-based fashions, and huge language fashions (LLMs) are the most typical. Every mannequin is constructed utilizing neural community architectures, although they differ of their measurement and complexity. These strategies have already demonstrated potential to boost sure data-centric workflows inside the trade. For instance, VAEs have been used to create artificial volatility surfaces to enhance choices buying and selling (Bergeron et al., 2021). GANs have confirmed helpful for portfolio optimization and threat administration (Zhu, Mariani and Li, 2020; Cont et al., 2023). Diffusion-based fashions have confirmed helpful for simulating asset return correlation matrices beneath varied market regimes (Kubiak et al., 2024). And LLMs have confirmed helpful for market simulations (Li et al., 2024).

Desk 1.  Approaches to artificial information technology.

TechniqueForms of information it generatesInstance functionsGenerative?
Monte CarloTime-seriesPortfolio optimization, threat administrationNo
Copula-based featuresTime-series, tabularCredit score threat evaluation, asset correlation modelingNo
Autoregressive fashionsTime-seriesVolatility forecasting, asset return simulationNo
BootstrappingTime-series, tabular, textualCreating confidence intervals, stress-testingNo
Variational AutoencodersTabular, time-series, audio, photographsSimulating volatility surfacesSure
Generative Adversarial NetworksTabular, time-series, audio, photographs,Portfolio optimization, threat administration, mannequin coachingSure
Diffusion fashionsTabular, time-series, audio, photographs,Correlation modelling, portfolio optimizationSure
Giant language fashionsTextual content, tabular, photographs, audioSentiment evaluation, market simulationSure

Evaluating Artificial Knowledge High quality

Artificial information ought to be lifelike and match the statistical properties of your actual information. Present analysis strategies fall into two classes: quantitative and qualitative.

Qualitative approaches contain visualizing comparisons between actual and artificial datasets. Examples embody visualizing distributions, evaluating scatterplots between pairs of variables, time-series paths and correlation matrices. For instance, a GAN mannequin skilled to simulate asset returns for estimating value-at-risk ought to efficiently reproduce the heavy-tails of the distribution. A diffusion mannequin skilled to provide artificial correlation matrices beneath totally different market regimes ought to adequately seize asset co-movements.

Quantitative approaches embody statistical assessments to match distributions reminiscent of Kolmogorov-Smirnov, Inhabitants Stability Index and Jensen-Shannon divergence. These assessments output statistics indicating the similarity between two distributions. For instance, the Kolmogorov-Smirnov check outputs a p-value which, if decrease than 0.05, suggests two distributions are considerably totally different. This will present a extra concrete measurement to the similarity between two distributions versus visualizations.

One other method entails “train-on-synthetic, test-on-real,” the place a mannequin is skilled on artificial information and examined on actual information. The efficiency of this mannequin might be in comparison with a mannequin that’s skilled and examined on actual information. If the artificial information efficiently replicates the properties of actual information, the efficiency between the 2 fashions ought to be comparable.

In Motion: Enhancing Monetary Sentiment Evaluation with GenAI Artificial Knowledge

To place this into observe, I fine-tuned a small open-source LLM, Qwen3-0.6B, for monetary sentiment evaluation utilizing a public dataset of finance-related headlines and social media content material, often known as FiQA-SA[1]. The dataset consists of 822 coaching examples, with most sentences labeled as “Constructive” or “Detrimental” sentiment.

I then used GPT-4o to generate 800 artificial coaching examples. The artificial dataset generated by GPT-4o was extra various than the unique coaching information, overlaying extra firms and sentiment (Determine 1). Growing the range of the coaching information offers the LLM with extra examples from which to be taught to establish sentiment from textual content material, doubtlessly bettering mannequin efficiency on unseen information.

Determine 1. Distribution of sentiment lessons for each actual (left), artificial (proper), and augmented coaching dataset (center) consisting of actual and artificial information.

Desk 2. Instance sentences from the actual and artificial coaching datasets.

SentenceClassKnowledge
Hunch in Weir leads FTSE down from file excessive.DetrimentalActual
AstraZeneca wins FDA approval for key new lung most cancers capsule.ConstructiveActual
Shell and BG shareholders to vote on deal at finish of January.ImpartialActual
Tesla’s quarterly report exhibits a rise in automobile deliveries by 15%.ConstructiveArtificial
PepsiCo is holding a press convention to handle the latest product recall.ImpartialArtificial
Dwelling Depot’s CEO steps down abruptly amidst inside controversies.DetrimentalArtificial

After fine-tuning a second mannequin on a mix of actual and artificial information utilizing the identical coaching process, the F1-score elevated by almost 10 proportion factors on the validation dataset (Desk 3), with a last F1-score of 82.37% on the check dataset.

Desk 3. Mannequin efficiency on the FiQA-SA validation dataset.

MannequinWeighted F1-Rating
Mannequin 1 (Actual)75.29%
Mannequin 2 (Actual + Artificial)85.17%

I discovered that rising the proportion of artificial information an excessive amount of had a destructive impression. There’s a Goldilocks zone between an excessive amount of and too little artificial information for optimum outcomes.

Not a Silver Bullet, However a Useful Device

Artificial information is just not a alternative for actual information, however it’s value experimenting with. Select a technique, consider artificial information high quality, and conduct A/B testing in a sandboxed atmosphere the place you examine workflows with and with out totally different proportions of artificial information. You is perhaps shocked on the findings.

You’ll be able to view all of the code and datasets on the RPC Labs GitHub repository and take a deeper dive into the LLM case research within the Analysis and Coverage Middle’s “Artificial Knowledge in Funding Administration” analysis report.


[1] The dataset is on the market for obtain right here: https://huggingface.co/datasets/TheFinAI/fiqa-sentiment-classification



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