Explain the Concept of ‘Iceberg Orders’ and Their Effect on Perceived Liquidity.
An iceberg order is a large limit order that is split into smaller, visible limit orders (the 'tip') and a large, hidden portion (the 'iceberg'). Only the tip is visible on the order book.
They are used by large traders to conceal their true order size and avoid front-running. They make the order book appear less liquid than it actually is, as the hidden volume is not factored into the visible depth.