Solana Rose 10% and Bitcoin 5%: Is the Rotation Into Altcoins Starting?

Quick Read

• Solana's 10% surge and Bitcoin's 5% gain on September 18 reflected a market-wide bid, not capital rotating out of Bitcoin into altcoins.

• Bitcoin crossing $80,000 triggered $170 million in forced short liquidations, mechanically amplifying prices rather than signaling fresh spot demand.

• True rotation requires altcoins to outperform on days Bitcoin trades flat; Solana slipping below its September 18 close suggests a one-day squeeze.

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On September 18, Solana (CRYPTO:SOL) opened at $101.52, soared to $114.34, and closed at $112.70, marking a notable 11% increase in the Solana price in just one day. In contrast, Bitcoin (CRYPTO:BTC) opened at $76,349, hit a high of $81,388, and closed at $80,875, gaining 5.9%.

While Solana appeared to outpace Bitcoin significantly, leading many traders to speculate about a rotation of capital into altcoins, it's worth digging deeper into the session's dynamics.

Two Rate Decisions and a Short Squeeze Lifted the Whole Crypto Market on September 18

The day's trading followed critical rate announcements. The Federal Reserve had raised interest rates by 25 basis points on September 16, its first hike since 2023, which effectively priced in the expected outcome and allowed both Bitcoin and Solana to hold steady near their respective support levels. The narrative shifted when the Bank of Japan raised rates to 1.25% on the morning of September 18, weakening the yen and driving capital into dollar-denominated assets as U.S. Treasury yields fell.