Top Ten: Weekend roundup: Trump’s new health-care battle | Profiting from health care | Real contrarian investing

MarketWatch rounded up 10 of its most interesting topics over the past week.

1. Trump pushes back against Obamacare

President Trump has signed an executive order allowing health insurers to offer lower-cost plans that aren’t subject to the requirements of the Affordable Care Act, also known as Obamacare. The Trump administration has also announced it will end federal subsidies to health insurers required under Obamacare, with acting Health and Human Services Secretary Eric Hargan and Seema Verma, the administrator of the Centers for Medicare & Medicaid Services, saying the Obama administration had “overstepped the legal boundaries drawn by our Constitution.”

2. Long-term opportunities for health-care investors

Jeff Reeves believes health care is still a wonderful area for long-term investors, despite the rumblings in Washington. He describes five ways to play the sector, no matter which way the political winds blow.

Here’s more on which health insurers might win and which might lose over the short term.

Read: Wall Street analysts expect gains of up to 64% on their favorite health-care stocks

3. You call yourself a contrarian investor?

Mark Hulbert provides an example of a truly contrarian stock play.

4. The market wisdom of a Nobel Prize winner

Richard Thaler, professor of behavioral science and economics at the University of Chicago’s Booth School of Business, is this year’s winner of the Nobel Prize in Economic Sciences. Here’s a video interview in which Thaler discusses investment strategy.

Thaler has inspired people to add tens of billions of dollars to their retirement accounts, Alessandra Malito reports.

Also see: How robo advisers put Richard Thaler’s Nobel-prize winning ideas into action

Read on: 12 things you can learn about investing from Nobel Prize winner Richard Thaler

5. A bull market can exhaust investors’ minds

William Watts shares information about the ways high stock valuations and low volatility can distort your ability to make the best investment decisions.

6. How you might be harmed by executives’ garbled language

Confusing language used by CEOs during earnings conference calls is tied to poor stock performance, according to research by S&P Global Market Intelligence. A company called Prattle is conducting similar research into how executives’ communication style can be a forward indicator of how well a company performs.

7. A different way to make money on Tesla

When Tesla began taking pre-orders for its Model 3 electric car, customers had to make a deposit, but the deposit was refundable. Now people are selling those reservations for fat profits, Claudia Assis reports.

8. Investing in space

As space exploration continues to be privatized, investors will want to learn how to make money from it. Ryan Vlastelica describes this new area for long-term growth investors.

9. Here’s another industry Amazon might crush

Emma Court explores the possibility that Amazon.com Inc.

AMZN, +0.43%

 may enter and disrupt another giant industry.

10. Real surprises during earnings season

Each earnings season, it is typical for about 70% of S&P 500

SPX, +0.21%

 companies to “beat” analysts’ consensus earnings estimates. One reason for this is companies and analysts tend to set up the beats by lowering expectations. So it cannot be a surprise if a company beats the estimates. Ciara Linnane and Tomi Kilgore list four real surprises that may be in store for investors this earnings season.

Want more from MarketWatch? Check out our Personal Finance Daily or other newsletters, and get the latest news, personal finance and investing advice.