S&P 500: what to expect after a particularly strong second quarter?

A statistical analysis reveals historical patterns indicating continued gains in the S&P 500 index after a strong second quarter and positive mid-year returns.

By the SpyStocks desk · 1mo ago · 3 min read

After closing the second quarter of 2026 with an impressive 14.9% return in the S&P 500 index, the numbers start to speak:

This is not about financial astrologers' predictions, but about history that statistically tends to repeat itself, whether the market likes it or not.

History shows that when the S&P 500 index decides to surge and rise by more than 10% in the second quarter, it usually does not stop.

Since 1950, we have seen a remarkably consistent pattern: when we enter a situation of such a strong second quarter, future performance is nothing short of amazing:

In the third quarter, the average historical return is 5.3%, with an 88.9% probability that the market will end positive.

In the fourth quarter, the data becomes more aggressive with an average return of 6.1% and a statistical probability of 100% (yes, you read that right, 100%) that the market will end positive.

Summarizing the last 6 months of the year, we are talking about an average return of 11.7%, with a statistical probability of 88.9%.

When the market breaks out, it does so with a force that leaves bears out of the game.

The "sweet spot" of the half-year. Let's look at the overall picture since the beginning of the year:

As of the end of June 2026, the index stands at a 9.6% return – this falls exactly into what is professionally called the "sweet spot" – the return range between 5% and 10%.

The statistical data here presents an unequivocal picture:

When the market is in this range mid-year, the average return for the last six months stands at 6.6% – with a historical success rate of 87.5%.

Furthermore, the average return for the full year in such a situation jumped to 13.9%, with an impressive statistical probability of 93.8% for a positive close.

But as always, it is important to note that:

Although past performance is not a guarantee of future performance – and technically they are right – the market is a machine driven by momentum and crowd psychology.

When such positive data reaches investors, it can, on the one hand, become a self-fulfilling prophecy.

On the other hand, it is always important to consider data such as market multiples and geopolitics, which can always change the equation.

We conclude with a fresh and optimistic tweet from President Trump:

America's golden age is beginning...!

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