Bitcoin climbed above $80,000 Tuesday for the first time since mid-May, capping what CNBC described as the cryptocurrency's biggest three-day rally since 2023, according to Cryptonomist, as bitcoin rose as much as 2.9% to touch $81,257 before settling around $79,300, according to Bloomberg. The cryptocurrency gained roughly 22% to 38% over the preceding week, depending on the specific measurement window, marking one of its strongest short-term advances in years. Here are five key factors analysts have identified behind bitcoin's sudden surge.

1. The U.S. Treasury's expanded bond buyback program

The single most frequently cited catalyst behind the rally is the U.S. Treasury Department's decision to significantly expand its buybacks of long-dated government debt. According to crypto.news, the Treasury doubled its long-end buyback limits to at least $4 billion, a move that initially sent bond yields lower and signaled easing monetary conditions to markets. The Block reported that analyst d'Anethan connected that decision directly to bitcoin's rally, explaining the logic behind the move. "Treasury decision to artificially lower rates by buying back bonds sends a powerful and solid signal that monetary conditions and thus capital are easing up. It's easy to see why BTC, which underperformed in the first half of 2026, would be the prime beneficiary of this," d'Anethan said.

2. A "debasement trade" driving investors toward bitcoin and gold

Several outlets identified a broader macroeconomic dynamic, commonly referred to as the "debasement trade," as a key driver of the rally. According to the Rio Times, easing Treasury yields and expanded bond buybacks........

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