The stock market is experiencing a remarkable surge as the S&P 500 and Nasdaq notched new record highs, capping a stunning second-quarter comeback. Positive sentiments surrounding trade deals and tax bill discussions have fueled this rally, despite ongoing concerns about economic uncertainties. Notably, the S&P 500 has closed at its all-time high, marking the best quarter in over a year. Analysts highlight four key factors driving this upward momentum, while the markets remain vigilant towards potential risks ahead.