Since about 2013, most, all?, completely automated trading systems have ingested some form of news headline as well as sentiment on it. 2-3 times year a story

Since about 2013, most, all?, completely automated trading systems have ingested some form of news headline as well as sentiment on it. 2-3 times year a story like this comes across the news wire and its a good test to see who blindly follows headlines, vs who actually uses the headline and sentiment news as just one of many signals that are mixed together to create a trading signal. Of course since most algos also have a momentum component, it becomes hard to see who has poor risk management vs who is just following the momentum and piling on:( I remember two cases, one was about the FED raising rates by 2% and another was that a plane had flown into the whitehouse that was published by the AP. Rule #1 of machine learning - No data is clean, no matter how much you pay for the data, there is always noise.