NanoStockk / Getty Images A speculative bubble is a spike in asset values within a particular industry, commodity, or asset class to unsubstantiated levels, fueled by irrational speculative ...

A combo of lower taxes, lower tariffs, and lower rates could create a new bubble in markets, BofA's Michael Hartnett said.

This raises the question: just what is a speculative bubble? The Oxford English Dictionary defines a bubble as “anything fragile, unsubstantial, empty, or worthless; a deceptive show.

"Nvidia's recent stock performance, driven by the enthusiasm surrounding generative AI and soaring earnings, seems to exhibit many characteristics of such speculative bubbles," they added.

Cryptocurrencies like bitcoin (Exchange: BTC=) are in a "speculative bubble" and are unlikely to become mainstream currencies, according to UBS (Swiss Exchange: UBSG-CH) . There are over 1,000 ...

Goldman Sachs argues AI stocks aren't in a speculative bubble, unlike the 1990s tech boom, citing strong earnings growth. Magnificent 7 tech companies hold over 30% of the S&P 500 but trade at ...

Cliff Asness, co-founder of AQR Capital Management, believes bitcoin is in a speculative bubble after the cryptocurrency's swift rally carried it above $100,000 following the November presidential ...