Top 3 Materials Stocks That May Plunge This Month - AptarGroup (NYSE:ATR), Koppers Holdings (NYSE:KOP)

Core Insights - The materials sector is showing signs of overbought conditions, which may be a warning for momentum-focused investors [1] Company Summaries - Koppers Holdings Inc. (NYSE: KOP): Recently raised its quarterly dividend from $0.08 to $0.09 per share. The stock has increased approximately 21% over the past month, reaching a 52-week high of $35.70. The Relative Strength Index (RSI) value is reported at 81.2. On the last trading day, Koppers shares rose by 1.4%, closing at $35.11 [2]