1. Tax refunds expected to boost consumer spending by $517 billion next year. 2. S&P 500 projected to hit 7,400-7,600 by year's end. 3. Average tax refunds could increase $1,600 to $2,000 per person. 4. Upcoming tax refund timing may enhance stock market rally. 5. Concerns over tariffs could influence supply chain pressures and stock volatility.