Bank of America's (BofA) latest calculations indicate that systematic strategies currently have only about $9 billion in buying capacity remaining in an upward-trending market, and would net sell approximately $1 billion if the market remains flat. However, should the market decline, selling from Commodity Trading Advisors (CTAs) and volatility control strategies could reach as high as $163 billion. Furthermore, as corporate buyback blackout periods rapidly expand in September, machine-driven buyback demand will significantly shrink, further weakening market support.