Tick Size Impact

The tick size is the minimum allowable price increment for an asset on a specific exchange, and it plays a major role in market microstructure. A smaller tick size allows for finer price discovery but can lead to "flickering" order books where orders are constantly adjusted by tiny amounts.

A larger tick size can consolidate liquidity but may prevent trades from occurring at the true market clearing price, forcing traders to accept wider spreads. The choice of tick size affects the behavior of market makers and the profitability of high-frequency trading strategies.

It acts as a constraint on the precision with which participants can express their price views. Understanding how tick sizes influence order flow is essential for predicting how different exchanges will behave under various market conditions.

It is a fundamental parameter of the exchange's rulebook.