US Stocks See Strong Quarterly Gains; Yen Hits Decades-Low; Supreme Court Upholds Fed Autonomy

US equity markets have recorded their strongest quarterly performance in six years, indicating robust investor confidence. Concurrently, the Japanese yen has fallen to its lowest value against the dollar in four decades, reflecting significant currency market shifts. Separately, the Supreme Court's recent decision affirmed the Federal Reserve's independence, particularly regarding the tenure of its governors.