Ask a dozen people on the street what happens in a bull market, and you’ll likely get the same cheerful answer: "Stocks go up!" It’s the prevailing narrative, the financial headline that gets clicks, and the feeling that fuels investment club meetings. But here’s the raw, unfiltered truth from someone who’s navigated a few of these cycles: while the overall market trend is upward, not all stocks participate equally, and believing the simple "everything goes up" story is one of the fastest ways to make expensive mistakes. A bull market isn't a uniform rising tide that lifts every boat equally. It's more like a chaotic, selective flood where some vessels soar, others barely stay afloat, and a few spring leaks and sink despite the overall water level rising.
What You’ll Learn
The Bull Market Reality: Averages vs. Individual Stories
Let's define our terms. A bull market is typically characterized by a sustained rise of 20% or more in broad market indexes like the S&P 500 or the Dow Jones Industrial Average, following a previous decline of 20% or more (a bear market). The key word is broad market indexes. These are weighted averages.
Think of the S&P 500 index. Its performance is dominated by its largest components—the mega-cap tech stocks, the financial giants, the healthcare behemoths. When we say "the market is up," we often mean that these giants are having a great day, pulling the average up with them. This creates a powerful illusion.
I remember looking at my portfolio during the 2017 bull run and feeling like a genius. The S&P was hitting new highs weekly. But a closer look told a different story. My carefully picked, mid-cap industrial stock was flatlining. It wasn't losing money, but it wasn't participating in the party either. Meanwhile, a speculative biotech ETF I'd dabbled in was swinging wildly. The average was up, but my individual holdings were telling three separate stories.
The Takeaway: A rising index is a statement about the collective, not a guarantee for the individual. Your job as an investor is to move beyond the headline average and understand what's happening under the hood.
Why Some Stocks Lag (or Fall) in a Rising Market
If the tide is rising, why do some boats sink? Here are the main reasons, often overlooked in the general euphoria.
1. Sector Rotation: Money Chases the Hot Story
Bull markets aren't monoliths. They have phases—early, middle, and late. In each phase, investor favor rotates between sectors.
- Early Phase: After a recession, cyclical stocks (like industrials, materials, consumer discretionary) often lead as the economy recovers.
- Middle Phase: Growth stocks (especially technology) and broader market participation take over.
- Late Phase: Defensive sectors (utilities, consumer staples, healthcare) and sometimes energy or materials might catch a bid as investors seek value or inflation hedges.
If you're holding utility stocks in the early, roaring phase of a tech-driven rally, you'll likely underperform. Your stocks aren't "bad," they're just out of favor. This rotation is a constant, silent force reshaping leaderboards.
2. Company-Specific Problems Trump Macro Trends
A great economy can't fix a broken business model. Imagine a major retailer failing to adapt to e-commerce, a pharmaceutical company with a key drug failing clinical trials, or a tech firm losing its competitive edge. These are idiosyncratic risks.
In a bear market, such news crushes the stock. In a bull market, it might still crush the stock, even while the index climbs 2% that day. The positive macro trend provides a softer landing, but gravity of bad fundamentals still works.
3. The "Overvaluation" Anchor
Sometimes, a stock has already priced in years of perfect growth during the previous bull run or a speculative spike. When the broader market rallies again, this overvalued stock has little room to run. Investors see better opportunities elsewhere. It sits there, a reminder that past performance is the most dangerous anchor for future expectations.
How to Invest in a Bull Market Without Getting Burned
So, if not all stocks go up, how should you approach a bull market? The goal shifts from "picking winners" to "avoiding catastrophic losers and capturing reliable growth."
| Strategy | What It Means | Why It Works in a Bull Market |
|---|---|---|
| Broad Index Fund Core | Making a low-cost S&P 500 or total market ETF the foundation (e.g., 50-70%) of your portfolio. | You guarantee participation in the overall upward trend without needing to pick the specific winning stocks. It's the ultimate "rising tide" play. |
| Thematic or Sector ETFs | Adding smaller allocations to ETFs focused on trends you believe in (e.g., cloud computing, robotics, clean energy). | Allows you to target areas of the market you think will lead the rally, without the single-stock risk of picking the wrong company in that theme. |
| Disciplined Stock Selection | If picking individual stocks, focus on companies with strong balance sheets, proven earnings, and clear competitive advantages. | These "quality" companies are more likely to weather sector rotations and participate in gains. They are less likely to be the ones that fall despite the bull run. |
| Ruthless Rebalancing | Setting and sticking to target percentages for different assets, and selling winners to buy laggards to maintain those targets. | Forces you to sell high (take profits from winning sectors) and buy low (add to underperforming but sound assets), combating greed and fear. |
The most common error I see? Investors abandoning their core index fund because it feels "boring" compared to their friend's 300% return on a meme stock. They chase the hot story, often buying near the peak. The bull market ends, the meme stock collapses, and they're left with nothing, having sold their steady, compounding index fund to fund the gamble.
3 Common Bull Market Myths Debunked
Let's puncture some balloons.
Myth 1: "You can't lose money in a bull market." This is dangerously false. You can lose money by buying overvalued stocks at the peak, by panic-selling during a healthy correction (even bull markets have 5-10% pullbacks), or by picking the companies with fundamental problems as described above.
Myth 2: "High-risk, speculative stocks are the best play." In the late, frothy stages of a bull market, this sometimes appears true. Low-quality "junk" stocks can skyrocket on pure speculation. But they are also the first and hardest to fall when sentiment shifts. It's like dancing in a room where someone is slowly removing the floorboards. You might have fun for a while, but the ending is predictable.
Myth 3: "A bull market means the economy is perfect." Not necessarily. Markets are forward-looking. A bull market can start in the depths of a recession on hopes of recovery. It can also be fueled by easy monetary policy (low interest rates) from institutions like the Federal Reserve, even if economic growth is modest. Don't conflate market performance with the daily economic reality on Main Street.
Your Bull Market Questions, Answered
So, do stocks go up in a bull market? The broad market does, and that's the powerful force you want to harness. But beneath that soaring average lies a world of nuance, rotation, and individual company drama. The savvy investor doesn't just ride the wave; they understand its currents, avoid the hidden rocks, and builds a portfolio that can sail through both the sunshine and the eventual storms. Focus on the structure of your boat (your asset allocation and core holdings) more than chasing the fastest, flashiest speedboat in the fleet. That's how you turn a bull market from a spectator event into a genuine builder of long-term wealth.
