Zip Co Ltd (ASX: ZIP) shares are falling on Thursday, giving back a big chunk of the gains from yesterday's huge rally.
In afternoon trade, the Zip share price is down 9.40% to $1.808.
That leaves the ASX fintech stock down roughly 45% in 2026, despite yesterday's massive 19.46% jump to $1.995.
The strong gain on Wednesday came after Iran agreed to a temporary ceasefire with the US and Israel, which helped lift confidence across the broader share market.
Growth shares such as Zip were among the biggest winners from that improved mood.
But by today, that optimism has already faded.
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Why Zip shares are falling today
The recent weakness comes as fresh Middle East developments again weigh on risk appetite across the share market.
Reports of Israeli attacks in Lebanon have raised doubts over how long the temporary ceasefire can last, reversing much of the confidence that drove yesterday's rebound.
As a higher-growth fintech stock, Zip often sees larger swings when investors move away from riskier parts of the market and into more defensive areas.
The S&P/ASX 200 Information Technology Index (ASX: XIJ) has also come under pressure again today, down 6.93%, which has added to weakness across local tech shares.
That backdrop helps explain why Zip has gone from a near 20% rally yesterday to a fall of close to 10% today. And this is even without any company-specific update driving the move.
Big swings are nothing new for Zip
This kind of volatility has become a regular feature for Zip shares.
The stock has been moving wildly for months as investors respond to changing views on interest rates, consumer spending, and now the Middle East war.
Even before this week's geopolitical developments, Zip had already seen some large moves.
Its half-year results in February triggered a big share price drop, despite the company reporting strong earnings growth and continued momentum in the US business.
Since then, the stock has regularly bounced hard on good news, only to pull back again when market nerves return.
This week's price action is another example of just how quickly the market's view on Zip can change.
Foolish Takeaway
Zip is clearly capable of delivering huge short-term moves, but that level of volatility would make it too unpredictable for my own portfolio.
While the growth story still has appeal, I would rather focus on more stable businesses that are also delivering solid earnings growth without the same headline-driven swings.
For me, there are simply better risk-reward opportunities elsewhere on the ASX.
