U.S. equities are having one of their strongest months of the year. Bitcoin, by contrast, is stuck.

The S&P 500 has gained 3.12% in August, adding roughly $2.1 trillion in market capitalization and pushing its total value to a record $70.5 trillion at 7,723 points. The Nasdaq and Dow are similarly buoyant. Wall Street is in full risk-on mode.

Bitcoin is up just 2% over the same period, trading around $64,600 — a level it has occupied for weeks. The cryptocurrency that once led risk assets higher is now trailing far behind.

An AI-Driven Rally Bitcoin Can't Follow

Part of the disconnect stems from the nature of the equity rally. It is being driven primarily by AI and semiconductor stocks — sectors bitcoin has little direct exposure to.

"Partly because the equity rally is being driven by areas to which bitcoin has little direct exposure, particularly AI and semiconductor stocks," said Adam Haeems, head of asset management at Tesseract Group, which manages more than $500 million in client assets.

Paul Howard, senior director at market-making firm Wincent, echoed that view. "The stock rally is biased towards AI and mega-caps which doesn't necessarily translate into crypto flows. The crypto market rally driven previously by ETF demand the last two years has been subdued as it now seeks its own catalyst independent of US equities."

Macro Tailwinds, Delayed Transmission

Some macroeconomic forces should benefit both markets. The reopening of the Strait of Hormuz and a drop in oil prices are positive for risk assets broadly. But the transmission mechanism to crypto runs through inflation expectations and Federal Reserve policy, which takes longer to materialize.

"Lower oil prices resulting from a reopening of the Strait of Hormuz could benefit both markets, but through different channels," Haeems explained. "Equities receive a relatively immediate benefit through lower business costs. For bitcoin, the effect runs through inflation expectations and then Federal Reserve policy."

Crypto-Specific Headwinds

Bitcoin is also fighting its own battles. The $120 million Coldcard wallet exploit has damaged sentiment around self-custody. Uncertainty surrounding the Clarity Act — the major crypto market structure bill working through the Senate — is keeping institutional capital cautious. Reports that Strategy (formerly MicroStrategy) has sold bitcoin in three consecutive months have added pressure.

Rising bond yields are creating an additional drag. Leading stablecoin USDT's supply has dropped from approximately $190 billion in April to $183 billion, while USDC has declined from $79.5 billion to $72 billion. With real Treasury returns at their highest since 2008, capital is being paid to remain outside crypto.

The Halving Cycle Thesis

According to Markus Thielen, founder of 10x Research, much of the inaction may be psychological. Many traders have bought into the four-year halving cycle thesis, which points to a bottom in early October. They are waiting on the sidelines.

"Bitcoin traders have shown little urgency to position for a move higher, even as US stocks rally," Thielen told CoinDesk. "This is a notable reversal from last October, when most of these same traders dismissed the four-year cycle outright."

Whether the cycle thesis proves correct or not, the immediate result is unmistakable: the largest cryptocurrency market in the world is sitting still while equities soar. Howard suggested that the next real catalyst for crypto may not arrive until Q4, when the market expects regulatory clarity and continued stablecoin growth.

For now, bitcoin's correlation to equities — one of the defining macro relationships of the post-COVID era — appears to have loosened. Whether that proves temporary or permanent remains the key question for the remainder of 2026.