Global week ahead: Welcome to September, Wall Street's least-loved month

1. S&P 500 hit a record high of over 6,500 in August. 2. September is historically the worst month for stocks, including S&P 500. 3. Mixed sector performance noted; banking sector outperformed amidst economic uncertainty. 4. Some experts predict a bullish market, others foresee economic pressures ahead. 5. Key economic data releases and central bank decisions are upcoming.