Top Ten: Weekend Roundup: Amazon And Health Care | Worst May Be Over For GEs Stock | Dont Defeat Your Index Funds Purpose

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

1. Here’s an industry Amazon may not be able to disrupt

Even Amazon.com AMZN, +0.19% strikes out once in a while. Here’s how difficult a time the company is having as it tries to make a big splash in the medical-device distribution business.

2. A good technical sign for GE’s stock

Tomi Kilgore explains why shares of General Electric may be near a cyclical bottom.

3. How to misuse index funds and ETFs

Your behavior as an investor may defeat the purpose of your index funds and ETFs.

4. A possible medical breakthrough and a soaring stock

A successful midstage drug trial might lead to a much faster treatment for a terrible health problem, while making investors a lot of money.

5. Some bitcoin for the holidays?

If you are considering giving someone bitcoin or another currency, read this first.

Also see: This gift will turn your child into a savvy investor

6. Wal-Mart’s incredible comeback

Jeff Reeves believes Wal-Mart Stores Inc.’s WMT, -0.24% comeback is for real and will be sustained; he gives seven reasons why.

7. Here’s how much S&P 500 companies pay in income taxes

The House of Representatives and Senate have each passed a bill lowering the federal income-tax rate to 20% from 35%. If Congress passes a combined bill and President Trump signs it, there will be a huge windfall for many American companies. But not all. Here’s a new calculator that shows the median income-tax rate for every S&P 500 company and sector for the past 11 years. The results may surprise you.

8. This new trend could be very costly for drivers

Commuters are now paying up to $40 to drive 10 miles from Northern Virginia into Washington, D.C. Here’s why this might happen where you live.

9. How to protect your family from online threats

Eric Cole, a cybersecurity veteran who has experience with the CIA, has six credit cards, replaces them regularly and has a separate computer just for banking. Here’s his advice on how to limit computerized threats online and at the mall..

10. You can date without going broke

Quentin Fottrell has plenty of advice on how to show your date a good time without wasting money.

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