Bitcoin Wins Half Its Days Against the S&P and Still Loses the Month

I keep two charts open every morning. Bitcoin priced in dollars, and Bitcoin priced against the S&P 500. The second one has been quietly embarrassing for most of this year. Last week it stopped being embarrassing.

Glassnode's data puts Bitcoin's relative win rate against the S&P back above 50% in recent sessions. In June that number was closer to one session in five. Roughly six years since it looked that bad.

So the meta shifted. Keep up.

What a win rate actually measures

Here's the mechanic. Take every trading day. Ask one question. Did BTC close higher than the S&P 500 did? Count the yeses, divide by the total. That's the relative win rate.

It's a coin-flip stat dressed up as a signal. And that's exactly why it's worth watching, because it exposes the gap between how people talk about Bitcoin and how Bitcoin actually trades.

You'll hear it called an uncorrelated store of value on green days and a high-beta risk asset on red ones. Both descriptions can't be true on the same Tuesday.

Here's the part most people miss. You can win 55% of your days and still finish the month down. A fat-tailed asset does that all the time. Three ugly 8% down days will erase twenty tidy 1% wins, and no one screenshots the down days. That's the entire story behind beating the S&P on most trading days while losing on the month. The daily scoreboard is noise wearing a lab coat.

June taught that lesson the hard way. One in five sessions. Six years since the ratio was that lopsided. If you'd been trading off daily BTC-versus-SPX wins that month, you got chopped to pieces.

BlackRock is the market now

Coinbase Institutional's Oct. 23 report has the number that should be taped to every allocator's monitor. Since Aug. 1, BlackRock's IBIT pulled in roughly $6 billion. Every other spot Bitcoin ETF on the planet, combined, pulled in about $500 million.

Twelve to one.

That isn't a competitive market. It's one product with a distribution army and a row of well-meaning also-rans behind it. And the also-rans built good funds. Fidelity built a good one. Bitwise built a good one. Several of them charge less than IBIT's 0.25%, and they still lost the flow war by an order of magnitude.

Because flows don't follow fees. They follow shelf space. They follow the wirehouse approved list, the model portfolio slot, the RIA platform that already custodies the advisor's other $400 million. BlackRock spent decades building that plumbing. A crypto-native asset manager can't buy it with a marketing budget.

This is what onboarding actually looks like. Not a wallet download. A ticker showing up inside a 60/40 model where a guy in Ohio never has to learn what a seed phrase is.

And it cuts both ways. The same rails that made it easy to get $6 billion in make it just as easy to pull it out. There's no loyalty in a rebalancing rule.

What the concentration costs you

Pull the camera back and the picture gets uncomfortable.

The marginal Bitcoin buyer in late 2025 is an advisor trimming or adding a 1% to 2% sleeve inside a portfolio model. That buyer doesn't care about halvings. Doesn't care about block space, ordinals, or which L2 is winning this quarter. They care about the 10-year yield and whether the risk committee cut their budget on Tuesday.

Which means BTC's price action increasingly rhymes with leveraged Nasdaq. Look at how it behaved in the last two risk-off stretches. It didn't hedge anything. It amplified.

So here's my question. If your Bitcoin carries something close to a 1.4 beta to tech on the days that matter, what exactly are you diversifying?

Answer honestly and a lot of pitch decks need rewriting.

The flip side is that this concentration isn't purely bad. A single, deeply liquid, institutionally legible wrapper is how an asset class graduates. Gold went through the same door with GLD. Nobody nostalgic for the days of buying bullion from a guy named Sal.

But graduation has a cost. Bitcoin now trades on other people's calendars. When the 10-year spikes, IBIT bleeds, and the price follows. The asset didn't get weaker. The ownership base got more professional, and professionals sell fast.

What I'd do with this

Stop scoring Bitcoin by daily win rate. Watch the monthly close instead. If BTC finishes a month red against the S&P while winning 55% of the sessions inside it, the win rate was trivia and the monthly candle was the truth.

Then watch IBIT's daily flow print like it's a sentiment index, because functionally it's. Four hundred million in means risk appetite is alive. Two flat weeks means something is turning underneath and nobody's announced it yet.

And size the position for what it actually is. High-beta tech exposure deserves high-beta tech sizing. If you're carrying Bitcoin as a gold substitute, that first real drawdown is going to hurt a lot more than your model predicted.

One more thing, and this is the part that bothers me. A lot of people will read "win rate back above 50%" this week and take it as a green light. It's not. It's a coin that landed heads after landing tails five times in June.

Bitcoin's daily scoreboard just flipped. The monthly one hasn't. Trade accordingly.