noun
peak of a financial bubble; bubble peak
Refers specifically to the height of an economic bubble, most commonly the Japanese asset price bubble around 1990.
バブル絶頂期には、誰もが株や土地に投資していた。
At the peak of the bubble, everyone was investing in stocks and land.
バブル絶頂期の日本では、異常な地価高騰が社会問題になった。
In Japan at the bubble peak, the abnormal surge in land prices became a social problem.
バブル崩壊 means the bursting of the bubble, the event that follows the peak.
Compound of バブル (bubble, from English) + 絶頂期 (peak period). The term is closely associated with the Japanese asset price bubble of the late 1980s.