4 ms·

But, and someone correct me if I'm wrong, not if the HFT apple trader buys from the apple seller at the lower price and then resells it.

• grandalf 17y ago
  If course the HFT trader wouldn't sell unless it could profit by selling. They are HFT traders, not market makers. Obviously if you are buying shares sold by an HFT trader, you are not buying them from a market maker, so you are getting a better price than the market maker is willing to offer.
  • cturner 17y ago
    HFT is a technique that's used by many people, including exchanges, hedge funds and market makers. You're right though - the exchange is obliged to fill the consumer at the best available price.
    • grandalf 17y ago
      I meant market makers in the role of traditional market maker (which could be HFT but is not HFT as a strategy, merely as a speed measurement).
      • cturner 17y ago
        Thanks for correction. On HFT - in what sense is it ever anything other than a speed measurement?
        • grandalf 17y ago
          Well, lately people are using HFT to describe specific sorts of strategies... mainly strategies that rely on per-trade kickbacks, etc., not just high speed.
• yummyfajitas 17y ago
  If the HFT trader offers a lower price, and you offer a higher price, the exchange will fill your order first.