In the wake of Donald Trump's inauguration, the S&P 500 index closed at a record high, buoyed by investor optimism surrounding his proposed deregulation and tax reductions. Trump's appearance at the World Economic Forum in Davos elicited enthusiasm from U.S. executives, as he advocated for lower oil prices, lower interest rates, and reduced regulatory burdens. This sentiment contributed to a mixed performance on Wall Street during the first week of his presidency, with gains accumulated amid positive market reactions to his economic agenda. Analysts noted that the markets are closely monitoring Trump's policies, including potential tariff threats and macroeconomic data.