Reddit’s $805M Quarter and S&P 500 Entry: Don’t Buy a Forced Trade
Buying Reddit because index funds have to is the sort of trade that punishes late arrivals. Its $805M quarter is impressive. Forced buying is not a thesis.
Buying Reddit because index funds have to is the sort of trade that punishes late arrivals.
On Tuesday, August 18, Reddit joins the S&P 500 after a $805 million quarter. Index funds will need to own it. Plenty of investors will see that forced buying and convince themselves they have found easy money. That is how easy money becomes expensive.
The real story is bigger than one stock
Reddit will replace AvalonBay Communities in the S&P 500 before the U.S. market opens on August 18. The news pushed Reddit shares up 12.6% on Friday, August 14.
The obvious headline is prestige. Reddit has gone from chaotic internet noticeboard to a member of America’s flagship equity index barely more than two years after its March 2024 IPO. That is a serious corporate achievement.
But prestige is not why the market moved.
The S&P 500 is tracked or benchmarked by trillions of dollars. Funds that explicitly mirror the index do not get to have a philosophical debate about whether Reddit is fairly priced. If Reddit is in the index, they buy Reddit. The managers may think it is cheap, dear or as annoying as a bloke giving investment advice after three beers. Does not matter. Their job is to track the benchmark.
That mechanical demand is the attraction. It is also the trap.
A company entering the S&P 500 gets a temporary tailwind from a known change in ownership. But a new pool of compelled shareholders does not make the underlying business more valuable on its own. It just changes who is holding the shares.
That distinction matters because investors routinely confuse a trade with an investment. An index inclusion can be a trade. A business that compounds cash for years is an investment. Sometimes you get both. Often, you get a noisy few days followed by reality returning to the room.
Reddit has earned its seat
Let’s be fair: this is not a meme-stock promotion dressed up as finance.
Reddit’s June-quarter numbers were properly strong. Revenue rose 61% year on year to $805 million. Advertising revenue rose 64% to $762 million. Net income came in at $253 million, equal to a 31.4% net margin. Adjusted EBITDA was $343 million, or 42.6% of revenue. Operating cash flow hit $262 million and free cash flow was $261 million.
Those are not “one day we might monetise this thing” numbers. They are the numbers of a business that has learned how to turn audience attention into cash without having to build a data centre the size of Western Australia.
Daily active uniques rose 18% to 130.3 million. Weekly active uniques rose 24% to 514.6 million. International revenue rose 84% to $167 million, faster than U.S. revenue growth of 56%.
And management guided for third-quarter revenue between $860 million and $870 million, with adjusted EBITDA of $385 million to $395 million.
That is the bit worth respecting. Reddit is not entering the S&P 500 because the committee likes its logo. Admission requires size, liquidity and a demonstrated ability to make money. It has delivered eight consecutive quarters of revenue growth above 60% and is showing the sort of operating leverage founders pretend they will have in slide 17 of the pitch deck.
The business has another advantage: it owns something AI cannot easily manufacture from scratch — communities full of people arguing, reviewing, explaining and sharing lived experience at scale. In a web increasingly clogged with polished machine output, real human judgement has become commercially useful.
Useful, mind you. Not invincible.
The background every investor needs
Passive investing has become one of the most powerful forces in markets because it is brutally sensible for most people.
The average saver pays less in fees by buying broad index funds than by hiring someone to guess which stocks will outperform. Over long periods, many active managers fail to beat the index after costs. So capital has poured into index products.
Good. That is a win for savers.
But every sensible system has side effects. When a stock enters a major benchmark, money that tracks the benchmark must adjust. When a stock leaves, that same money sells or reduces exposure. The decision by an index committee can therefore create real short-term buying and selling pressure that has nothing to do with a customer, a product release, a profit margin or management execution.
This is what makes S&P 500 entry such a strange event. It is both meaningful and not meaningful.
Meaningful because it confirms Reddit has reached a level of commercial maturity that qualifies it for the index. Not meaningful because Tuesday’s forced purchases tell you very little about whether Reddit’s next three years of earnings will justify whatever price you pay today.
Do not outsource your thinking to a rebalance.
The second-order effect: passive money rewards the winners
The more interesting lesson sits one level deeper.
Public markets increasingly reward businesses after they have already proved themselves. A company grows, becomes profitable, gains liquidity, reaches index eligibility, receives broader institutional ownership and becomes easier for large pools of capital to own. That can lower friction around the shares and improve access to capital.
It is a flywheel — but it spins after the hard part.
Founders should pay attention. The market does not care how clever your product roadmap is if the economics are rubbish. It cares whether growth converts into durable gross profit, cash generation and a balance sheet that lets you survive a bad year without putting the hat around.
Reddit’s June quarter makes the point beautifully. Its 91.3% gross margin and $261 million of quarterly free cash flow give it options. It can invest, repurchase shares, acquire capability or simply pile up cash while weaker competitors are still explaining why their losses are actually a strategic advantage.
This is why I would rather own a great business with improving economics than chase the announcement around it. The announcement is a consequence. The operating machine is the cause.
The overlooked risk: index inclusion is not a moat
Here is the contrarian bit: the S&P 500 can make a company easier to own while making investors less disciplined about why they own it.
A passive fund does not care whether Reddit’s advertising growth slows. It does not care whether international monetisation disappoints, whether AI changes search behaviour, whether advertisers pull back in an economic wobble, or whether a platform built on millions of unruly communities can keep improving its product. It owns the stock because the rules say it must.
You do not have that excuse.
Reddit’s current momentum is excellent, but the valuation question is forward-looking. The market already knows revenue is growing quickly. It already knows margins are strong. It already knows the company is joining the index. Your job is to ask what must be true from here.
Can Reddit sustain outsized revenue growth as its revenue base gets larger? Can it keep ad growth ahead of user growth? Can it monetise international audiences without wrecking the user experience? Can it preserve the authenticity that makes its content valuable while becoming a more aggressive commercial platform?
Those are the questions that decide returns. Not whether a fund buys shares at the close of a rebalance.
The same principle applies far beyond Reddit. Whenever you hear “institutional buying,” ask whether it is conviction capital or mechanical capital. The first has an opinion. The second has a mandate. Confusing the two is a reliable way to buy someone else’s excitement.
What this means for you
If you are a saver, keep your broad index fund. Do not get cute because one constituent has a dramatic week. The entire point of indexing is that you do not need to make a decision every time the committee changes the furniture.
If you are an investor considering Reddit specifically, separate the calendar event from the business case. Write down three things before touching the buy button: the earnings growth you expect, the risk that could break that expectation, and the price you are willing to pay. If your thesis begins and ends with “index funds have to buy it,” you do not have a thesis. You have a countdown timer.
If you are a founder or operator, steal the useful lesson. Build a business that throws off cash. Growth gets attention; cash buys freedom. Reddit’s $805 million quarter matters because it paired rapid growth with a 31% net margin and real free cash flow. That is what earns serious ownership over time.
And if you are tempted to chase the forced trade, remember this: the market is full of people who made a tidy profit being early, then handed it back because they arrived late and called it conviction.
Don’t be that bloke.