Thursday’s market action caught more than a few traders off guard, as a surprisingly sharp rally in a handful of names pushed indexes higher despite what appeared to be currency intervention ahead of tonight’s Bank of Japan meeting. The dollar continued to strengthen even though Treasury settlement flows were relatively muted, suggesting that news flow carried more weight than mechanical positioning on the day. Yet beneath the surface of the equity rally, several foreign exchange signals are flashing warning signs that contradict the optimistic price action in stocks.
The S&P 500 has now been pinned below 7,450 since July 23, and that level remains the critical ceiling bulls need to break through. A decisive gap higher that clears resistance could open the door for a run back toward 7,500, potentially filling the void left by the selloff on July 22. However, Thursday’s rebound itself created a gap following Wednesday’s steep drawdown, and those kinds of gaps tend to be unstable, often filling quickly before any sustainable trend takes hold.
What may matter just as much is what happened in currency markets. USD/JPY weakened materially in what looked like intervention ahead of the BOJ decision — an unusual move timing-wise that has traders bracing for volatility. Since 2023, the three-month implied correlation index and USD/JPY have moved as near mirror images of each other. If that relationship holds, implied correlation looks poised to rise, which would pressure dispersion strategies lower and potentially drag on broader equity performance.
Adding to the mixed picture, USD/KRW continued to weaken as well, making the semiconductor sector’s strength on Thursday somewhat puzzling given how reliable that FX-relationship has been in recent weeks. If this rally has been largely fueled by liquidity and that liquidity is now being pulled back, then the signals coming from foreign exchange simply do not support the move seen in equities. Traders heading into Friday may want to ask whether stocks are leading or lagging the real story unfolding in currencies.
