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melt up

C1 formal inseparable intransitive
In simple words

When prices in a market go up very fast because everyone is scared of missing out on profits — not because the economy is really that good.

Literal meaning: A play on 'melt down' reversed — instead of collapse, an upward, liquid-like surge that defies gravity.

Meanings

1 C1 idiomatic formal

A rapid, broad, upward movement in financial markets driven by investor fear of missing out on gains, rather than by strong economic fundamentals.

"Some analysts are warning that the current stock market behavior looks less like a bull run and more like a melt up."

"The question isn't whether stocks are going up — it's whether this is a genuine bull market or a dangerous melt-up."

— Common phrasing in financial commentary; widely used in publications such as Bloomberg and The Wall Street Journal during the 2017–2018 market rally
Grammar: inseparable
Usage notes

A finance and economics jargon term. It is the market equivalent of 'FOMO' (fear of missing out) driving irrational exuberance. Used primarily by analysts, investors, and financial journalists. Relatively recent term, popularized particularly during the late 2010s bull market. Not used outside financial contexts.

Commonly used with

market stocks equities rally bull market investors

Forms

Base
melt up
I/you/we/they
3rd person
melts up
he/she/it
Past simple
melted up
yesterday
Past participle
melted up
have + pp
-ing form
melting up
continuous

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Synonyms

market surge rally irrational exuberance FOMO-driven rally

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