The US, Japan, and Korea just teamed up to support the falling Japanese yen, but the panic about another 2024-style market crash looks overblown for now.

• The US set up a rolling $60 billion-a-day line so Japan can borrow against its US government bonds instead of dumping them, which would push US interest rates higher.
• A weaker yen makes imports pricier and drives up inflation in Japan, which could force a surprise rate hike — exactly what triggered the August 2024 selloff when the Nasdaq dropped 10% in days.
• These currency rescues rarely work; past Japanese bailouts all faded within weeks as short sellers came right back.
• A real crash needs a perfect storm: Japan hiking by surprise, the Fed pausing, and inflation running hot in Japan but cool in the US — unlikely all at once.
• For now this reads as a buy-the-dip moment, not a crisis, though Nasdaq tech stocks are still soft heading into a possible late-year bottom.

Outlook: As long as Japan's rate moves stay expected and telegraphed, markets should shrug this off, but an unsignaled Bank of Japan hike remains the key danger to watch.