I guess you are completely oblivious to how HFT's work and their actual position in the markets. I am a bit biased considering that I work in the industry but a

I guess you are completely oblivious to how HFT's work and their actual position in the markets. I am a bit biased considering that I work in the industry but actually working in the industry gave me the inner workings of it and how actually they help to close / tighten the bid - ask spread for various securities. I would highly recommend you to read this book ( https://press.princeton.edu/books/hardcover/9780691211381/trading-at-the-speed-of-light https://press.princeton.edu/books/hardcover/9780691211381/tr... ) or if it's too long form, read this article ( https://www.thediff.co/p/jane-street https://www.thediff.co/p/jane-street ) I am not saying HFT's are in charitable business but they do serve an important role in the financial markets.