I've reproduced 130 research papers about “predicting the stock market”
&gt;Literally every single paper was either p-hacked, overfit, or a subsample of favourable data was selected<p>including methods that use:<p>&gt;News Text Mining. - This is where they&#x27;d use NLP on headlines or the body of news as a signal.<p>I have to call this out.<p>Is this author suggesting that you couldn&#x27;t have made money by shorting Enron stocks milliseconds after the scandal was made public? Is it impossible to make money by buying a stock in a small company, seconds after an acquisition is announced? If a CEO gets sent to prison, will that company&#x27;s stocks not be affected?<p>And then there are other methods that use:<p>&gt;Fundamental data. So ratios from the income statement&#x2F;balance sheet<p>So buying stocks in companies with good financial health is not profitable?<p>Something&#x27;s being left out here.