Predicting Financial Volatility from Personal Transactional Data

Rui Ying Goh, G. Andreeva, Yi Cao
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Abstract

Cash flow transactions of individuals fluctuate over time and can be irregular. Financial volatility measures the variation of individuals’ financial behaviours i.e., the degree of uncertainty from the cash flow fluctuations. The evaluation of financial volatility is important in order to identify potentially risky behaviours that may harm financial wellbeing. This study predicts financial volatility from transactional data coming from current accounts. In this work, we develop a financial volatility composite index as the target variable, which simultaneously accounts for the fluctuations in income, expenditure, and financial buffer (or balance). Then, we fit a linear regression model to investigate the relationship between transactional behaviours and financial volatility. Lastly, we compare the performance of linear regression with XGBoost, a machine learning algorithm, in predicting financial volatility. We observe some risky volatile behaviours that imply financial difficulties. High financial volatility signals an increased risk, if it is associated with potential financial struggles that require long term dependence on overdraft, lower spending on fixed and living costs, or problems in catching up with regular financial commitments. At the same time, low financial volatility may be implying an increased risk too, if it is associated with restricted transactions due to extreme negative balances or consistent heavy overdraft usage. In general, the proposed financial volatility predictive model provides insights into the implicit risk of customers and their vulnerability.
从个人交易数据预测金融波动
个人的现金流交易随着时间的推移而波动,可能是不规律的。金融波动率衡量个人金融行为的变化,即现金流量波动的不确定性程度。为了识别可能损害金融健康的潜在风险行为,对金融波动性的评估非常重要。这项研究通过来自经常账户的交易数据预测金融波动。在这项工作中,我们开发了一个金融波动综合指数作为目标变量,它同时考虑了收入、支出和金融缓冲(或余额)的波动。然后,我们拟合了一个线性回归模型来研究交易行为与金融波动之间的关系。最后,我们比较了线性回归与XGBoost(一种机器学习算法)在预测金融波动方面的性能。我们观察到一些有风险的波动行为意味着财务困难。如果与潜在的财务困难(需要长期依赖透支)、固定和生活成本支出减少或在赶上定期财务承诺方面存在问题有关,则高金融波动性意味着风险增加。与此同时,低金融波动性也可能意味着风险的增加,如果它与由于极端负余额或持续严重透支使用而受到限制的交易有关。总的来说,所提出的金融波动率预测模型提供了对客户隐含风险及其脆弱性的洞察。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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