The deal between the White House and Republicans reduces the risk of a U.S. default, which would have had severe consequences for the economy and financial markets. This agreement maintains the country's credit rating and prevents a potential financial crisis, which is positive for the SPY ETF as it tracks the performance of the S&P 500 Index. The reduced uncertainty and maintained credit rating will likely lead to increased investor confidence and a positive short-term impact on the SPY ETF.