團隊

Our paper examines analyst reports and online stock opinion articles which recommend buying stocks that, based on the literature, trade at high prices and earn low future returns ("short-leg securities"). Using a textual analysis, we test whether the justifications primarily (1) emphasize safe-haven qualities, (2) indicate exuberance, or (3) highlight lottery-like features. Our results strongly point to (3). We subsequently validate our text-based inferences through a survey of institutional and retail investors with long positions in short-leg securities. Overall, perceived upside potential appears to play a material role in driving investor demand for stocks in the short legs of anomalies.

近年，類似於ChatGPT的大語言模型（Large Language Model，LLM）在全球迅速普及，展示出巨大的應用潛力。 通過海量數據的訓練，這些模型能夠生成連貫且語義合理的文本，並具有卓越的問答能力。 在政務服務領域，公眾一般通過政府官網、移動應用查詢政策法規、辦事流程等資訊，或者前往政務服務大廳求助。

While venture capital firms are increasingly relying on recommendation models in investment decisions, existing startup recommendation models fail to consider the uniqueness of venture capital context, including two-sided matching between investing and investee firms and a lack of information disclosure requirements on startups. Following the design science research paradigm and guided by the proximity principle from social psychology, we develop a novel framework called SocioLink by depicting and analyzing various relations in a knowledge graph via machine learning. Our experimental results show that SocioLink significantly outperforms state-of-the-art startup recommendation methods in both accuracy and quality. This improvement is driven by not only the inclusion of social relations but also the superiority of modelling relations via knowledge graph. We also develop a web-based prototype to demonstrate explainable artificial intelligence. This work contributes to the FinTech literature by adding an innovative design artifact—SocioLink—for decision support in the investment context.

神經科學和社會心理學的大量文獻指出，人類天生對別人如何看待自己很在意。在本文中，我們提出投資者的印象管理策略最終亦可以主導他們以口碑相傳方式所傳遞的內容，並可能不經意間造成噪聲的傳播。我們分析來自美國最大的投資相關網站之一的伺服器日誌檔數據，發現結果與我們的見解一致，即投資者會更積極地分享適用於印象管理的文章，即使這些文章不太準確地預測回報。其他分析亦指出，高層次的此類分享會導致定價過高。