Noise(redirected from Noise immunity)
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A slight uptick or downtick in a security's or market's price and/or volume representing little or no actual change in its fundamentals. Noise occurs in the short-term; if noise continues in a certain direction, it becomes a trend, and, therefore, an indication of the general direction of the security or market. Noise, on the other hand, means little or nothing.
Random market fluctuations that make it difficult to forecast the market's direction.