Fundstrat managing partner and research head Tom Lee believes the S&P 500 benchmark could rally towards the 7,900 to 8,000 level if the market successfully navigates three major events this week. These obstacles include the release of the core personal consumption expenditure (PCE) price index for July on Wednesday, Nvidia's second-quarter earnings announcement after market close on Wednesday, and the speech by Fed Chair Kevin Warsh at the Jackson Hole economic symposium on Friday.