Here are 5 stocks added to the Zacks Rank #5 (Strong Sell) List today:Aileron Therapeutics, Inc. ALRN is a clinical-stage biopharmaceutical company. The Zacks Consensus Estimate for its current year earnings has been revised nearly 13% downward over the last 30 days.Nordic American Tankers Limited NAT is a tanker company that acquires and charters double-hull tankers. The Zacks Consensus Estimate for its current year earnings has been revised 29.6% downward over the last 30 days.Repsol, S.A. REPYY operates as an integrated energy company. The Zacks Consensus Estimate for its current year earnings has been revised 20% downward over the last 30 days.Zurich Insurance Group AG ZURVY provides insurance products and related services. The Zacks Consensus Estimate for its current year earnings has been revised 5.2% downward over the last 30 days.PTC Inc. PTC operates as software and services company. The Zacks Consensus Estimate for its current year earnings has been revised 0.7% downward over the last 30 days.View the entire Zacks Rank #5 List.Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Repsol SA (REPYY): Free Stock Analysis Report Nordic American Tankers Limited (NAT): Free Stock Analysis Report PTC Inc. (PTC): Free Stock Analysis Report Zurich Insurance Group Ltd. (ZURVY): Free Stock Analysis Report Aileron Therapeutics, Inc. (ALRN): Free Stock Analysis Report To read this article on Zacks.com click here.