noun
reactionary decline; downturn as a reaction
Economic term for a decline that occurs as a reaction to a preceding event, such as a drop after a surge or a correction following a boom.
株価は急騰の後、反動減に見舞われた。
After the sharp rise, stock prices suffered a reactionary decline.
需要の反動減が懸念されている。
A reactionary decline in demand is a concern.
反動高 is the opposite concept: a rise or surge that occurs as a reaction, often after a decline.
Compound of 反動 (reaction) and 減 (decrease, decline).