What Could Break The Bull Market This Summer

I’ve been watching markets for a long time, and there’s something about these long winning streaks that always makes me a bit uneasy. Sure, the momentum feels unstoppable when the S&P keeps climbing week after week. But then reality tends to step in, often at the worst possible moment. That’s exactly what we’ve seen recently after an impressive run that finally hit a wall.

The recent pullback wasn’t catastrophic by any means. It came in right around where many expected, offering a healthy reset rather than the start of something worse. Yet as we head deeper into summer, the bigger question lingers: what could actually threaten this bull market and turn a normal correction into something more painful?

The Pullback We Saw Coming

Let’s be honest. When an index climbs for nine consecutive weeks, it’s only natural for things to get stretched. Stretched markets like to snap back, and that’s pretty much what happened. From the peak near 7,621, we saw roughly a 4.5% decline that found solid footing right around the 50-day moving average. That’s the kind of behavior that often sets up the next leg higher rather than signaling the end of the party.

What stood out to me wasn’t just the depth of the dip, but how quickly buyers stepped in once prices reached that key level. The bounce showed broad participation instead of relying on just a handful of mega-cap names. In my experience, those kinds of moves tend to mark real lows rather than temporary relief rallies that fade fast.

Technically speaking, the setup improved noticeably. The RSI cooled off from overbought territory above 70 down into the low 40s before settling in a more neutral zone. That kind of reset without breaking the larger uptrend is textbook bullish action in a healthy market environment.

Money Flow Signals Turning Positive

One of the tools I’ve come to rely on more and more is tracking institutional money flows. The recent uptick in our breadth ratio back into buy territory tells an encouraging story. After a brief dip, the trailing four-week net flows swung sharply positive, which historically has been a solid contrarian indicator.

We’re maintaining full equity exposure based on these signals, but that doesn’t mean we’re ignoring the risks building underneath the surface. Being fully invested while staying vigilant isn’t a contradiction. It’s simply prudent portfolio management.

The riskiest thing in markets is the belief that there is no risk.

– Seasoned investor wisdom

This quote has never felt more relevant than right now. With spreads on high-yield bonds extremely tight, the market seems to be pricing in almost no chance of trouble ahead. That complacency is exactly when problems tend to surface.

Leverage Levels That Should Raise Eyebrows

Let’s talk about something that doesn’t get nearly enough attention in the mainstream conversation: margin debt. We’ve reached record levels recently, climbing dramatically over the past year. When you measure this borrowed money against the broader economy or money supply, we’re approaching zones that preceded some of the more notable tops in past cycles.

Borrowed money is great when prices are rising. It amplifies gains and makes heroes out of investors who time things right. But when sentiment shifts even slightly, that same leverage becomes a destructive force, forcing sales and creating downward pressure that can feed on itself.

I’ve seen this movie before. The accelerant that drove the rally can quickly turn into the catalyst for a sharper decline. That’s why keeping a close eye on these levels matters so much as we move through the warmer months.

The Fading Retail Enthusiasm

Another development worth watching closely is what’s happening with individual investors. While prices have generally trended higher, the retail bid appears to be rolling over in certain data points. This divergence between rising prices and waning participation from the crowd that helped fuel much of the advance is concerning.

When the marginal buyer starts stepping back, especially while valuations remain elevated, it creates a situation where supply can begin to overwhelm demand. This isn’t an immediate crisis, but it’s the kind of slow burn that can erode momentum over time if other factors align against the market.

Bonds Suddenly Looking Attractive

Here’s a comparison that really caught my attention recently. For the first time in quite a while in this cycle, the 10-year Treasury is offering a higher yield than the earnings yield on the S&P 500. Think about what that means for a moment. Risk-free government bonds are now paying more than what you earn owning the broad stock market on a trailing basis.

This inversion of the traditional equity risk premium creates a legitimate alternative for allocators. Why take on stock market volatility when you can earn more with far less risk in Treasuries? This dynamic hasn’t been a major factor until recently, but it could start influencing flows in meaningful ways.

• Record margin debt creating potential forced selling
• Retail participation showing signs of fatigue
• Treasury yields competing directly with stock earnings
• Increasing equity supply from major corporate actions
• Seasonal weakness patterns historically playing out

The Wall Of New Supply Coming

Beyond the technicals and sentiment indicators, there’s a fundamental supply story developing that could pressure prices. Major companies and private entities are preparing significant share offerings and public debuts. When lots of new paper hits the market at once, it requires substantial buying interest to absorb without creating downward pressure.

This isn’t about one or two isolated events. It’s a broader trend among some of the most highly valued names looking to raise capital. In a market already trading at premium valuations, this added supply could become more relevant than many currently expect.

I’ve always believed that markets ultimately reflect the balance between supply and demand. Right now, demand has been strong, but any softening could make this increasing supply much more noticeable.

Seasonal And Election Factors At Play

Summer trading has a reputation for being tricky, and the data backs this up over many decades. The period from May through October has historically delivered much more modest returns compared to the stronger winter and spring months. While “sell in May” isn’t a foolproof rule, ignoring seasonal tendencies entirely would be unwise.

Adding to this is the fact that we’re in a midterm election year. These years tend to bring higher volatility and larger drawdowns on average as investors position for potential shifts in Washington. The uncertainty around policy and power balance often weighs on sentiment.

Yet history also shows that these periods of weakness frequently set up stronger performance in the following year. The key is surviving the choppy waters without making emotional decisions that lock in losses.

Technical Levels To Watch Closely

From a charting perspective, several important zones stand out. The 50-day moving average served as excellent support during the recent dip. Holding above this level keeps the uptrend intact. A decisive break below could open the door to testing deeper retracement levels.

On the upside, we have the 20-day average followed by psychological round numbers and ultimately the recent highs. The quality of any move through these resistance areas will tell us a lot about the conviction behind the next potential leg higher.

These aren’t magic numbers, but they represent areas where many traders and algorithms are likely to react. Understanding them helps frame potential market behavior in the weeks ahead.

Earnings Expectations Remain The Wild Card

Ultimately, markets are driven by expectations about future profits. So far, those expectations have held up reasonably well. But any meaningful downward revision in forward guidance, especially while valuations sit near the higher end of historical ranges, could trigger a more significant repricing.

I’m particularly focused on second-half estimates and how companies are talking about their outlooks. The Federal Reserve’s upcoming decisions also matter, though perhaps less dramatically than in past cycles given how markets have already adjusted to the current rate environment.

In my view, the combination of high valuations and leverage creates a market that’s more vulnerable to disappointment than many realize. That’s not a reason to panic, but it is a reason to maintain discipline.

How We’re Approaching The Summer Months

Our approach remains balanced. We’re staying invested because the weight of evidence still points to higher prices eventually. However, we’re also implementing risk controls like trailing stops and avoiding the temptation to chase strength in the most extended names.

This isn’t about predicting a crash. It’s about recognizing that markets don’t move in straight lines and preparing accordingly. Having dry powder available when better opportunities emerge has served investors well through many cycles.

Markets can remain irrational longer than you can remain solvent.

– Classic investing wisdom

That’s why patience and risk management matter so much. The bull market has shown remarkable resilience, but ignoring the building pressures would be foolish.

Looking further out, the post-midterm period has often rewarded those who navigated the summer and fall volatility successfully. The historical pattern of larger drawdowns in midterm years followed by strong recoveries is worth keeping in mind.

Broader Economic Context

Beyond the stock market specifics, the economy continues showing mixed signals. Growth has been decent but not spectacular. Inflation appears contained but watch for any surprises in wage data or commodity prices that could shift Fed expectations.

Corporate balance sheets remain generally healthy for many large companies, providing some buffer. However, smaller businesses and certain sectors are feeling more pressure. This differentiation in performance across market segments is something to monitor closely.

The narrow leadership we’ve seen in recent months, concentrated in technology and related areas, also deserves attention. While concentration isn’t inherently bad, it does make the market more susceptible to sector-specific news or rotations.

Practical Steps For Investors

1. Review your portfolio allocation and rebalance where needed
2. Set clear stop levels based on technical support zones
3. Diversify beyond the most crowded trades
4. Keep some cash available for opportunistic buying
5. Stay informed but avoid emotional reactions to daily noise

These aren’t revolutionary ideas, but consistently applying them separates successful long-term investors from those who get caught in the emotional swings.

I’ve found that the times when markets feel most invincible are often when the foundation is actually getting shakier. The recent pullback offered a reminder that corrections are normal and healthy. The question is whether we’ll see just another garden-variety dip or something more substantial.

As we move through June and into the heart of summer, my base case remains constructive but cautious. The trend is still higher until proven otherwise. Yet the list of potential catalysts for a deeper move is growing. Staying disciplined doesn’t mean sitting on the sidelines completely. It means participating thoughtfully while protecting capital.

The beautiful thing about markets is how they continually test our assumptions and force us to adapt. What worked last month might need adjustment next month. That’s what keeps this game challenging and rewarding for those willing to put in the work.

Whether you’re adding to positions on this dip or trimming into strength, the key is having a plan and sticking to it. The summer months have a way of separating the prepared from the complacent. My hope is that more investors fall into the first category.

There’s still plenty of reasons for optimism if earnings continue to deliver and economic data doesn’t deteriorate sharply. But ignoring the warning signs would be a mistake. The bull market has run far and fast. Respecting its potential limits while participating in its strength seems like the prudent path forward.

In the end, successful investing often comes down to managing risk while allowing winners to develop. We’re in one of those periods where both aspects deserve equal attention. The next few months should prove interesting as these various forces play out.

What are your thoughts on the current setup? Are you feeling more bullish after the recent bounce or taking a more defensive stance? The conversation around these risks is exactly what helps all of us refine our approaches as conditions evolve.