Historically, Trump's statements about the US economy and its growth have led to increased market confidence and a subsequent boost in stock prices. The mention of 'many Trillions of Dollars of Investment in Plants and Factories' could indicate a potential increase in infrastructure spending, which may benefit industries such as construction and manufacturing. This, in turn, may lead to an increase in stock prices for companies within these sectors. Additionally, the overall positive tone of the post may reduce market volatility and increase investor appetite for riskier assets, further supporting a bullish market sentiment. However, it's essential to consider that Trump's statements are often subject to interpretation, and the actual impact on the stock market may vary depending on how investors perceive the post and its potential implications for the economy.