Three classic crash warnings are flashing red simultaneously

All three warnings activated at once

A rare and unsettling combination is playing out in financial markets right now: three indicators that have historically signalled an impending stock market crash are all showing danger signs at the same time. That is the finding of an analysis published this week by Nasdaq Markets.

According to the source, this signal pattern has been observed ahead of several of the most dramatic market collapses in modern financial history. The simultaneous activation of all three is considered statistically unusual and is being taken seriously by a wide range of market participants.

What does history tell us?

Historical data paints a clear picture of what such periods can entail. During the COVID-19 crash in March 2020, the S&P 500 fell more than 30 percent in just a few weeks. The Nasdaq corrections of 2019 and 2022 – of roughly 20 and 35 percent respectively – coincided with sharp declines in risk assets across the board.

What these episodes have in common is that risk aversion spreads rapidly across asset classes as investors seek safety. Institutional players, who typically hold positions in both equities and alternative assets, often sell their "high-risk positions" early in such episodes.

Crypto tends to follow – and fall harder

For investors with exposure to cryptocurrency, the historical record is particularly relevant. Research shows that during major equity market downturns, Bitcoin has historically experienced far steeper price declines than the broad indices. During the March 2020 crash, Bitcoin plunged 58 percent in six days, while Ethereum fell as much as 65 percent. Total crypto market capitalisation was cut in half.

Some analysts describe Bitcoin as a "leveraged version of the Nasdaq" – with far higher inherent volatility, around 44 percent compared with Nasdaq's 21 percent according to available data. During periods of equity stress, the 30-day correlation between Bitcoin and the S&P 500 has repeatedly exceeded 70 percent.

Signs of decoupling – but uncertainty persists

The picture is not clear-cut in 2026, however. Robert Mitchnick, Head of Digital Assets at BlackRock, has highlighted Bitcoin's "low correlation with the Nasdaq 100 during market stress" as a sign of growing institutional confidence and longer-term capital in the market. BlackRock's iShares Bitcoin Trust (IBIT) reportedly saw redemptions of only around 0.2 percent of its holdings during volatile periods – suggesting relatively stable institutional capital.

At the same time, events from June 2026 – when the crypto market lost around $250 billion in value while US equity indices remained stable – show that structural dynamics within the crypto sector itself, such as leverage and cascading liquidations, can override the correlation with traditional markets in either direction.

A degree of source-critical caution is warranted here: claims of decoupling are based on relatively short time series, and the picture could change rapidly if broad risk aversion takes full hold.

Investor behaviour under pressure

A consistent finding in research on investor behaviour during crashes is that crypto investors are increasingly treating sharp price declines as buying opportunities – in contrast to the Nasdaq crash of 2000, when many investors headed for the exits and the market took 15 years to recover. The number of crypto wallets has continued to grow even through severe downturns.

Nevertheless, professionals caution against underestimating the psychological impact of losses. Herd mentality, loss aversion, and overconfidence are well-documented behavioural patterns that can lead to irrational decisions in volatile markets – particularly when social media amplifies impulsive choices.

With the fear-and-greed index at 27 and three historical crash warnings activated simultaneously, there is little doubt that as of 12 August 2026, the market finds itself in a risk environment that demands caution – regardless of asset class.

Sources: Nasdaq Markets, Council on Foreign Relations (Rebecca Patterson), BlackRock/IBIT reporting, market data via 24markets.