Plummeting natural gas prices and disappointing production results in key regions like Louisiana severely impacted this energy player. : -50%

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

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

Facing investigations into billing practices and rising labor costs, this medical services provider saw its value nearly halve by year-end. : -44%

worst stocks to buy 2017