Here is the weekly recap from Briefing.com:

Additional signs that the strength of the global recovery is waning sparked selling pressure, resulting in sharp losses for the major indices.

The S&P 500 declined four consecutive sessions, with the bulk of this week's loss occurring on Wednesday (-2.8%). Losses were broad-based and trading volume was light, with the NYSE not surpassing 1 million daily shares for the 20th consecutive session.