What is a defining characteristic of a 'noise trader' in the market?

A defining characteristic of a 'noise trader' is engaging in trades without specific information. Noise traders typically make investment decisions based on random inputs, emotions, or market sentiment rather than relying on fundamental or technical analysis. Their trading can create volatility in the market, as their decisions can be influenced by factors like rumors, trends, or psychological biases rather than sound economic indicators or data-driven analysis.

In contrast, other types of traders—such as those who trade based on technical analysis or make informed trades using market data—base their decisions on structured methodologies and analyses that seek to predict future price movements. Additionally, focusing solely on long-term investments does not fit the noise trading behavior, as it implies a strategy based on a more informed perspective about the assets being traded. Thus, engaging in trades without specific information distinctly characterizes noise traders.