Core Viewpoint - The Japanese yen briefly rose to an 11-week high against the US dollar, reflecting traders' caution due to concerns over potential intervention by Japanese authorities in the foreign exchange market [1] Group 1: Market Reactions - Traders are particularly alert to "rate inquiries" that may occur around the opening of the US stock market, which are often initiated by regulatory bodies to gauge current market quotes [1] - Such inquiries are typically seen as a precursor to direct foreign exchange intervention [1] Group 2: Investor Sentiment - Current market trends indicate that investors are caught in a dilemma: on one hand, there is concern that if Japanese authorities intervene, the yen will strengthen rapidly; on the other hand, there is worry that without any policy signals, the yen may decline again [1]