medium · Market Microstructure

A limit order book shows 500 shares at the best bid of 20.00. A trader places a new limit buy order for 1,000 shares at20.01.

What is the most immediate MICROSTRUCTURE effect of this order?

  1. The order triggers an immediate execution with the existing bid.
  2. The order 'penny jumps' the queue and narrows the quoted spread.
  3. The order increases the depth at the 20.00 level.
  4. The order creates an immediate permanent price impact of $0.01.

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