Goldman Sachs' flow team noted in their latest report, "Witching Hour," that despite the subdued market sentiment, the technicals for US equities are shifting. Corporate buyback windows are set to reopen on a large scale from late October to November. Historically, retail investor funds have consistently flowed in during November-December, and foreign investors have a historical pattern of buying after midterm elections. This is expected to bring approximately $190 billion in foreign buying over the next six months.