Historically, positive trade developments have boosted market confidence, leading to increased investment in the SPY, which tracks the S&P 500 index. Trump's statement suggests progress in trade talks with Japan, which could lead to increased trade and economic cooperation between the two nations. This may have a positive impact on the US stock market, particularly on export-driven industries. The SPY, being a broad market index, is likely to benefit from improved trade relations and increased market confidence. However, the actual impact will depend on the specifics of any agreements reached and how they are implemented. Overall, the tone of the post suggests a positive development, which could contribute to a bullish market sentiment.