10 bad habits to kick in 2018

Start the New Year as you mean to go on by avoiding these wealth-killing habits.

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

The end of the year is a perfect time not only to review how your portfolio has performed but also to recognise any bad habits that may have been picked up along the way.

So, as we say ‘”cheerio” to 2017 and greet the New Year with a nervous nod of the head, here are 10 things you need to be watching out for.

1. Skipping on research

Buying any company without some understanding of how it makes its money is asking for trouble. Make the effort to read its recent reports. Click here if you simply can’t be bothered.

2. Ignoring alternative views

Thorough research involves asking why an investment or company may fail as much as why it may succeed. Taking a balanced approach ensures we avoid falling in love with certain businesses and become blind to the risks of owning them.

3.  Not diversifying

Investing heavily in just a few stocks could bring about life-changing wealth but it requires luck and nerves of steel. If this sounds too risky (and for most people, it is), stick to building a portfolio of quality companies diversified by geography and sector.

4. Not investing according to your own risk tolerance

Understanding your attitude to risk is vital if you’re to reach your financial goals and not be scared away from the stock market. There’s simply no point buying shares in an infrequently traded, ‘jam tomorrow’ company if you’re not prepared for a bit of volatility along the way. Struggling to sleep at night? You’re doing it wrong.

5. Not using up your ISA allowance

Failing to take advantage of your annual ISA allowance is a big no-no, even if you have nowhere near the maximum amount of £20,000 to invest in 2017/18. Build a wall around your profits. 

6. Not keeping track of fees

Regularly buying and selling shares sounds like fun but — thanks to commission fees and stamp duty — it’s also costly. To reduce your susceptibility to over-trading, consider keeping a log of all your expenses. If the costs begin eating into the gains from your portfolio, question your approach.

7. Assuming that cheap shares signify value

Many large companies suffered significant falls in their share prices over 2017. Don’t assume that these are now worthy of investment without doing appropriate research (see Habit 1) — they could have further to fall. Conversely, don’t be fooled into thinking expensive stocks can’t continue rising. 

8. Not running winners

Thanks to our tendency to snatch at profits, failing to stick with our best-performing stocks can be very bad for our wealth. If the story hasn’t changed (and the valuation hasn’t entered bonkers territory), why not hold on?

9. Ignoring your investing time horizon

A person’s investing time horizon will depend on their financial goals. Those wishing to buy a house in five years should probably stick to less volatile assets. Those investing for retirement several decades away can afford to have a far greater proportion of their wealth in equities. On a long enough timeline, a few down days/weeks/months really won’t matter.

10. Assuming that acting is better than not acting

Investing is one of the few areas in life where inactivity often translates to better performance. Before taking action on your portfolio, consider whether your motivation for doing so is based on nothing more than boredom. If so, it may be better to sit still.

Paul Summers has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Two white male workmen working on site at an oil rig
Investing Articles

The BP share price has been on a roller coaster, but where will it go next?

Analysts remain upbeat about 2026 prospects for the BP share price, even as an oil glut threatens and the price…

Read more »

Investing Articles

Prediction: move over Rolls-Royce, the BAE share price could climb another 45% in 2026

The BAE Systems share price has had a cracking run in 2025, but might the optimism be starting to slip…

Read more »

Tesla car at super charger station
Investing Articles

Will 2026 be make-or-break for the Tesla share price?

So what about the Tesla share price: does it indicate a long-term must-buy tech marvel, or a money pit for…

Read more »

Portrait of elderly man wearing white denim shirt and glasses looking up with hand on chin. Thoughtful senior entrepreneur, studio shot against grey background.
Investing Articles

Apple CEO Tim Cook just put $3m into this S&P 500 stock! Time to buy?

One household-name S&P 500 stock has crashed 65% inside five years. Yet Apple's billionaire CEO sees value and has been…

Read more »

Dividend Shares

How much do you need in an ISA to make £1,000 of passive income in 2026?

Jon Smith looks at how an investor could go from a standing start to generating £1,000 in passive income for…

Read more »

Investing Articles

Can the Lloyds share price hit £1.30 in 2026?

Can the Lloyds share price reproduce its 2025 performance in the year ahead? Stephen Wright thinks investors shouldn’t be too…

Read more »

Young woman working at modern office. Technical price graph and indicator, red and green candlestick chart and stock trading computer screen background.
Investing Articles

Down 45%, is it time to consider buying shares in this dominant tech company?

In today’s stock market, it’s worth looking for opportunities to buy shares created by investors being more confident about AI…

Read more »

A rear view of a female in a bright yellow coat walking along the historic street known as The Shambles in York, UK which is a popular tourist destination in this Yorkshire city.
Investing Articles

Is the BP share price about to shock us all in 2026?

Can the BP share price perform strongly again next year? Or could the FTSE 100 oil giant be facing a…

Read more »