Why the Crypto Market Still Doesn't Have an S&P 500 to Call Its Own

On Wall Street, the S&P 500 is the market's yardstick. In the world of cryptocurrencies, there's no single index playing that role, and traders end up watching several indicators at once, which don't always agree.

One example shows the difference. The S&P 500 is near its highs, but about 257 of the 500 companies are below their 200-day average, a sign of a rally concentrated in a handful of names. In crypto, it's the opposite: 88 of the 100 largest tokens, including Bitcoin and Ethereum, are above that average.

The candidates for a benchmark

There's no shortage of candidates for a benchmark. The CoinDesk 20 gathers 20 liquid assets and caps the weight of the largest ones. S&P has a broad index, with almost 200 assets, and another with the 30 largest coins. Nasdaq and CME built an index aimed at institutional investors. Since each one measures things its own way, the results can diverge on the very same day.

The difference lies in the rules. An index that caps the weight of the largest assets gives more room to smaller coins; one that weights purely by market cap ends up practically mirroring Bitcoin and Ethereum. A broad index, with hundreds of assets, includes low-liquidity tokens that are barely traded; a narrow index can leave out exactly the project that grew the most during the year.

Why a single number isn't enough

The chart shows bitcoin (BTC/USDT on Binance) from April 1, 2026 to October 7, 2026. Over the period, it went from $68,113.92 to $83,321.81, up 22.33%, with a low of $57,800.19 on July 1 and a high of $87,395.67 on September 21. On October 7 it was 16.1% above its own 200-day average, of $71,765.23, in line with the strength picture described above.

Other coins, over the same stretch, tell very different stories. Ether rose 20.27%, close to bitcoin. Dogecoin fell 3.42%. The NEAR token rose 347.94%. In an illustrative calculation with just these four assets, an equal-weighted index would have risen 96.78% over the period, while a market-cap-weighted index, dominated by bitcoin and ether, would have come in near 20%. The same basket, under two rules, would give two opposite readings on how the half-year went.

That's why none of the candidates has taken over. Each methodology answers a different question: how the market did as a whole, how the assets big investors can actually buy did, or how the average project did.

How traders find their bearings

In practice, traders combine three gauges: Bitcoin's own price, the market's total capitalization (with and without BTC and ETH), and Bitcoin dominance, which measures its share of the total value. When dominance rises, money is concentrating in Bitcoin; when it falls, it's spreading out into smaller coins.

Since the list of the largest projects changes fast and two assets concentrate much of the value, a single number may never be able to capture the crypto market. For anyone trading, the takeaway is to check more than one gauge before deciding whether the market is strong or weak, and to remember that the numbers above describe what happened, not what will happen.

Source: Traders Union.

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