There isn't one specific stock that is universally '80% down' — the answer depends entirely on the time period and starting point you choose, and the list of severely battered stocks changes by the week. At any given moment, dozens of publicly traded companies are sitting 80% or more below their all-time highs, and the names on that list shift constantly as some recover, some get delisted, and new ones join through fresh crashes.

This search term tends to spike after periods of market turbulence, when investors who bought into a popular stock during a rally want to know if what they're holding is an outlier or part of a broader pattern. The honest answer is that steep, 80%-plus declines are not rare. They happen somewhere in the market almost every year, concentrated heavily in a handful of predictable corners of the economy.

Highly speculative growth stocks are the most common source of these drops. Companies that went public through a traditional IPO or a special purpose acquisition company (SPAC) during a period of investor enthusiasm — often before they had proven, durable profits — are especially vulnerable. When sentiment shifts, or when it becomes clear that revenue growth can't justify the valuation, these stocks can lose the bulk of their value in a matter of months.

Biotechnology and early-stage pharmaceutical companies are another frequent source of 80%-plus wipeouts. A single failed clinical trial or a rejection from regulators can erase most of a company's market value overnight, because the stock price was built almost entirely on the expectation of future approval rather than current earnings.

Companies tied to a single hot trend — electric vehicles, cannabis, clean energy, cryptocurrency-adjacent businesses, or 'meme stock' names driven by social media enthusiasm rather than fundamentals — have also produced some of the steepest declines in recent market history. These stocks often rose quickly on momentum and speculation, and when that momentum reversed, there was little underlying business value to cushion the fall.

It's worth distinguishing between a stock being down 80% from its all-time high and a stock being down 80% over a shorter, more recent window. A stock that IPO'd at an inflated valuation and has simply drifted back down to a more reasonable price over several years tells a very different story than a company whose shares collapsed 80% in a few weeks after a scandal, a failed product, an accounting issue, or a liquidity crisis. The former may reflect a market correction; the latter often signals something has gone seriously wrong with the business itself.

If you're trying to identify stocks currently down 80% or more, most brokerage platforms and financial data sites let you screen stocks by percentage decline from their 52-week or all-time high. This is the most reliable way to get a real-time, accurate list, since any specific names published in an article will be outdated within days as prices move.

A few general warning signs tend to precede these collapses: rapid share-price appreciation with no corresponding increase in revenue or profit, heavy reliance on continued access to cheap financing, a business model dependent on a single product or customer, or a valuation that assumes near-perfect execution for years into the future. None of these signs guarantee a crash, but they show up disproportionately often in companies that later fall 80% or more.

For investors, a stock being down 80% is not automatically a buying opportunity or a sign of a company in terminal decline — context matters. Some companies do recover from steep drawdowns if their underlying business stabilizes; many others continue sliding toward bankruptcy or an eventual delisting. The safest approach is to evaluate the company's current revenue, debt load, and cash position rather than assuming that a large decline means the stock is now 'cheap.' A stock that has fallen 80% can still fall another 80% from there.

In short, there is no fixed answer to which stock is down 80% at any given moment — it's a constantly shifting list best checked through a live stock screener rather than a static article. What is consistent is the pattern: speculative, story-driven stocks with weak or unproven fundamentals are the ones most likely to end up on that list.