The Next Potential Trade War Unsettles Stock Market U.S. relations with Europe, not China, were the catalyst this time.

By Andrew Osterland

Opinions expressed by Entrepreneur contributors are their own.

Jingying Zhao | Getty Images

After closing yesterday, the U.S. Trade Representative proposed an $11 billion list of European goods, including commercial aircraft, dairy products and wine, on which to impose tariffs. The U.S. is considering the actions as retaliation for European subsides to Airbus and the aerospace sector. Separately, the International Monetary Fund lowered its estimate for global economic growth this year to 3.3 percent from 3.5 percent.

The major stock indexes were all down sharply. The Dow and S&P 500 indexes fell 0.72 percent and 0.61 percent respectively, while the Nasdaq Composite was off 0.56 percent. The Entrepreneur Index™ ended the day down 0.53 percent.

Starboard Value LP is making waves at companies on the Entrepreneur Index™. Yesterday, the activist investor backed off a fight with management at retailer Dollar Tree Inc. after the company agreed to make changes to its product pricing strategy. Today, it struck a deal with Cerner Corp., a provider of healthcare information technology, to install four new directors on Cerner's board, increase operating margins, and boost its share buyback program. Cerner stock was up as much as 16 percent before settling with a gain of 10.3 percent -- the biggest on the Entrepreneur Index™ today.

Clothing-maker Under Armour Inc. had the biggest decline on the Entrepreneur Index™, falling 4.69 percent. B. Riley analyst Susan Anderson reiterated a sell rating on the stock, pointing to the company's weakness in athletic footwear as a reason for concern. She put a price target of $12 on the stock -- more than 40 percent below its current $20.72.

Shares in casino-maker Wynn Resorts, up 40.8 percent this year, were down 3.86 percent today. The company announced it had terminated discussions to buy Australian firm Crown Resorts for $7.1 billion after news of the deal was prematurely leaked. Wynn is looking to diversify its operations in Macau, where its gaming licenses are up for renewal in 2022. Macau currently accounts for about two thirds of Wynn's revenues.

Other declines on the Entrepreneur Index™ included asset managers Franklin Resources (-2.81 percent) and BlackRock (-1.42 percent) and drug-makers Regeneron Pharmaceuticals (-1.38 percent) and Alexion Pharmaceuticals (-1.5 percent). Gap Inc. and REIT SL Green Realty Corp. were also down 2.95 percent and 2.34 percent respectively.

Only 12 of sixty stocks on the Entrepreneur Index™ posted gains today. Outside of Cerner Corp., tech stocks TripAdvisor Inc. (1.55 percent) and Facebook (1.51 percent) had the biggest gains. Food-maker J.M. Smucker Company was also up 1.27 percent.

The Entrepreneur Index™ collects the top 60 publicly traded companies founded and run by entrepreneurs. The entrepreneurial spirit is a valuable asset for any business, and this index recognizes its importance, no matter how much a company has grown. These inspirational businesses can be tracked in real time on Entrepreneur.com.

Andrew Osterland is a contributing writer for CNBC.com. He specializes in capital markets, personal finance and taxes.

Want to be an Entrepreneur Leadership Network contributor? Apply now to join.

Side Hustle

She Quit Her Job at Trader Joe's After Starting a Side Hustle With $800 — Then She and Her Brother Grew the Business to $20 Million

Jaime Holm and Matt Hannula teamed up to build a business in an industry that "didn't exist" yet.

Buying / Investing in Business

Former Zillow Execs Target $1.3T Market

Co-ownership is creating big opportunities for entrepreneurs.

Business Ideas

70 Small Business Ideas to Start in 2025

We put together a list of the best, most profitable small business ideas for entrepreneurs to pursue in 2025.

Growing a Business

This Local Bakery Has Lines Out the Door. Here Are the Secrets to Its Success.

Known for its viral flat croissants and innovative desserts, Alexander's Patisserie also excels in hands-on leadership and team culture.

Business News

Microsoft Is Laying Off Over 6,000 Employees, About 3% of Its Workforce. Here's Why.

The company said the cuts will affect all divisions and locations, with a focus on managers.

Business News

Nissan Is Doubling Its Initial Layoff Announcement, Cutting 20,000 Jobs: 'A Wake-Up Call'

The automaker is dealing with slowing sales and a recent failed merger with Honda.