The toymaker reeled from the bankruptcy of major retailer Toys 'R' Us and declining sales for core brands like Barbie and Hot Wheels. : -44%

Burdened by massive debt and weak natural gas prices, investors remained skeptical of the company's ability to balance its books. : -41%

Once a high-growth favorite, the retailer faced fierce competition and repeatedly slashed its sales forecasts as consumer preferences shifted. : -46%

The utility company’s stock collapsed after it abandoned a massive nuclear power project in South Carolina, leading to state and federal investigations. : -45%

The owner of Kay and Zales faced reputation issues following discrimination lawsuits and investigations into its financing practices.