To The Moon

Reddit dropped a bombshell after the US market closed Thursday — and by the time most of us woke up, the stock had already popped 11%. But the real story isn't Reddit — it's what index inclusion says about how the whole market works, and why the "boring" S&P 500 ETF in your portfolio might be doing more for you than any stock pick ever will.

[Miser] Hey Tigers, Let's Talk About the $Reddit(RDDT)$ Pop

$Reddit(RDDT)$ is joining the S&P 500. S&P Dow Jones Indices confirmed the change will take effect before trading opens on August 18, 2026, and the stock jumped over 10% in after-hours trading within minutes of the announcement Thursday evening US time.

Reddit is stepping in for $AvalonBay Communities(AVB)$ Communities, which is leaving the index after agreeing to be acquired by fellow S&P 500 member Equity Residential. That makes Reddit only the second pureplay social media company in the S&P 500, after Meta — $Pinterest, Inc.(PINS)$ and $Snap Inc(SNAP)$ are still too small, and X exited the index after Musk's acquisition.

📰 Why Was $Reddit(RDDT)$ Actually Added?

This wasn't a scheduled quarterly rebalance — it's an off-cycle swap triggered by $AvalonBay Communities(AVB)$'s exit. But Reddit still had to clear the bar every S&P 500 company must clear:

🔴 The checklist:

1. Market cap — at least $22.7 billion

2. Profitability — positive earnings, not just growth

3. Liquidity & float — enough shares trading freely for index funds to actually buy

$Reddit(RDDT)$'s fundamentals backed it up: Q2 revenue came in at $805 million, up 61% year-over-year — its eighth straight quarter of 60%+ growth, with net income of $252.85 million. That said, it's not all smooth sailing — slowing US user growth and traffic pressure from Google's AI Overviews are the read-through risks analysts are still watching.

🐯 Why it matters: The pop you saw isn't really about Reddit's business getting better overnight. It's mechanical — every fund that tracks the S&P 500 (and that's trillions of dollars) now has to buy RDDT shares to match the index, creating a short, sharp window of forced demand before Aug 18.

📈 This Year's S&P 500 Class — Winners and Losers

$Reddit(RDDT)$ isn't the only new face in 2026. It's been a busy year for reconstitution:

The pattern is familiar: stocks tend to pop on the announcement, driven by anticipated index-fund buying, not fresh news about the business. But that pop is no guarantee of anything longer-term — CRH plc, for example, has actually fallen over 10% since joining. And here's the twist that should make you think twice before chasing "index inclusion" plays: a recent academic study on S&P 500 additions found that over the long run, newly added companies don't just fail to beat their peers — they significantly underperform similar companies that never made it into the index. The bump is real, but it's short-lived, and it's shrinking every year as more traders front-run the announcement instead of waiting for the actual inclusion date.

🔮 Who Could Be Next?

Nobody outside the S&P committee knows for sure — inclusion is a discretionary decision, not an automatic formula. But based on public market-cap and eligibility screens, names currently being talked about as candidates include $Enbridge(ENB)$, $MercadoLibre(MELI)$, $Celestica(CLS)$, $Alnylam Pharmaceuticals(ALNY)$, $Twilio(TWLO)$, $Illumina(ILMN)$, $Affirm Holdings, Inc.(AFRM)$, $Zoom(ZM)$, $Okta Inc.(OKTA)$, and $SoFi Technologies Inc.(SOFI)$.

Worth remembering: meeting the criteria is necessary but never sufficient — the committee can (and does) pass over "obvious" candidates and pick surprises instead.

💡 The Real Lesson: Why the Index Itself Is the Real Star

Zoom out from Reddit, and what you're actually looking at is a live demonstration of why the S&P 500 index is such a powerful vehicle — regardless of which single stock is having its main character moment this week:k:

🔴 Three reasons the index beats stock-picking for most people:

1. Active managers rarely beat it. Year after year, the majority of professional, actively-managed large-cap funds fail to outperform the S&P 500 over 10–15 year periods (S&P's own SPIVA scorecards track this every year). If the pros with research teams and Bloomberg terminals can't reliably beat it, that's a strong signal for the rest of us.

2. It self-upgrades automatically. Reddit joining, AvalonBay leaving — this is the index doing quality control for you, continuously rotating out shrinking companies and rotating in bigger, more relevant ones. You don't have to spot the next Reddit; the index eventually does it for you.

3. It's built for dollar-cost averaging (DCA). Because the S&P 500 is diversified across 500 large US companies, it smooths out the risk of any single name blowing up. Regular, automatic investing into it — rather than trying to time entries — is one of the simplest, most repeatable strategies retail investors have.

📊 Beyond the Index Itself: S&P 500 ETFs Worth Knowing

Reddit joining the S&P 500 is a good reminder that you don't have to pick individual stocks to get this exposure — you can just buy the index. A few of the most common ways to do that:

🔴 Standard S&P 500 ETFs (1x exposure, built for long-term holding/DCA):

• $Vanguard S&P 500 ETF(VOO)$

• $SPDR S&P 500 ETF Trust(SPY)$

• $iShares Core S&P 500 ETF(IVV)$

🔴 Leveraged S&P 500 ETFs (2x/3x daily exposure):

• $Proshares Ultra S&P500(SSO)$

• $ProShares UltraPro S&P500 ETF(UPRO)$

• $Direxion Daily S&P 500 Bull 3X Shares ETF(SPXL)$

⚠️ But here's the catch with the leveraged ones — they're not just a "turbocharged" version of the ETFs above:

• They're built to track daily moves, not long-term returns — the leverage resets every single day.

• In choppy or sideways markets, this causes volatility decay: you can lose money on a leveraged ETF even if the underlying index is flat or slightly up over the same period.

• They're a short-term trading tool, not a "get rich slower but with extra sauce" version of index investing. DCA into these long-term can actually work against you.

🎯 Bottom Line

🐯 Reddit's S&P 500 inclusion is a good headline, but the more useful takeaway is structural: index membership is a moving, self-correcting system, and being in it or out of it says less about the long-term winner than people assume. The S&P 500 as a whole, though — bought consistently over time — remains one of the hardest benchmarks for any single stock, or any professional fund manager, to beat.

🐯 Tiger's Corner: Your Turn!

Question of the week:

Would you rather chase the next Reddit-style index-inclusion pop, or just DCA into the S&P 500 and let the index do the picking for you? 🤔

Drop your take in the comments! Best analysis gets Tiger Coins!

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