Altcoin Season Index Jumps to 62: 31/50 Coins Beat BTC
Altcoin Season Index Jumps 28 Points in Five Days
The altcoin season index sits at 62 as of Sept 6, up from 34 on Sept 1, the fastest five-day climb in recent weeks. The reading measures how many of the top 50 coins by trading volume have beaten BTC's 90-day performance. Right now 31 of the 50 qualify, up from 17 at the start of the week. The index still classifies the market as neutral, but the gap to the 75 level that signals a full altcoin season is closing quickly.
What Pushed the Breadth: ETH, ZEC, ARB Lead the Table
The outperforming group is not a random list. ETH is up 48% over 90 days on roughly $15.5 billion in daily volume, while ZEC has gained 132.7% and ARB 134.6%, both riding sharp squeeze rallies this week. DASH adds 87.2%, UNI 193.7%, and SOL 55.9%. Even the laggards tell a story: XRP at +21.5% and DOGE at +5.2% over 90 days still trail BTC's 26.8% gain, which is why the index has not flipped to a full season signal yet. The rally is broad but the heavyweights in the meme and payments corners have not joined in.
Fear & Greed Stays at 73 While Volume Rotates
The fear and greed index holds at 73, in greed territory, after touching 74 on Sept 4. Sentiment has stayed hot for a week straight. The interesting part is where the volume went. 24-hour liquidations total about $142.9 million with shorts paying 75% of it, and perp open interest is climbing on ETH, ARB and UNI rather than BTC. Traders are rotating leverage into the coins that are actually moving, which tends to extend alt breadth until funding turns sharply positive across the board.
What a 62 Reading Means for Position Sizing
An altcoin season index between 60 and 74 sits in a gray zone. History from the past year shows these readings often resolve one of two ways: either the index pushes past 75 and the rally broadens, or BTC reclaims leadership and alt breadth fades within a week. For position sizing, the 90-day outperformance data favors coins with real volume behind the move, ETH, ZEC, ARB and UNI, over names that pumped on thin books. Watch funding rates as the tell; a broad flip to strongly positive funding across exchanges would mark late-stage leverage, not a fresh start.
Data as of 09:58 Beijing time on Sept 6, covering Binance, OKX, Bybit, Hyperliquid, Gate and Bitget among major exchanges.