SPY faces significant resistance at upper border of bearish channel. Correspondingly, RSI weakens at that same level, where it fails to cross over its 60-level, suggesting heavy bearish pressure as this weeks concludes.
Regardless of the capitalization level of the S&P companies, this resistance appears to be endemic. For instance, notice how the WEEKLY charts of S&P 500's Small Caps ("$SML") and mid-caps ("$MID") below are heading towards same resistance.