What describes rapid inter-day price swings in the market?

The term that describes rapid inter-day price swings in the market is known as "whipsaws." This phenomenon occurs when asset prices fluctuate significantly in a short period, often leading to confusion and unpredictable outcomes for investors. Whipsaws can result from various factors, including market volatility, news events, and trading behavior, and they can cause investors to make ill-timed decisions.

Understanding whipsaws is crucial for investors because they highlight the need for careful risk management and the importance of having a solid strategy in place. While terms like market fluctuations and price volatility are related to changes in asset prices, they don't specifically capture the essence of the sharp, back-and-forth movement characteristic of whipsaws. Lock limit up refers to a trading mechanism that restricts price increases, which is different from describing price movements. Hence, whipsaws is the most appropriate term for describing such rapid price changes.