KEY POINTS
  • CNBC's Jim Cramer told investors to expect more negativity in the market as stocks enter a seasonally weak period in September.
  • Cramer laid out several key events set in the coming days, including his prediction for the "most positive thing" in the week ahead.

CNBC's Jim Cramer on Friday told investors to expect more negativity in the market as stocks enter a seasonally weak period in September.

The "Mad Money" host has been warning about the key date of Sept. 17 marking an inflection point after which stocks historically see a major decline.