As US and UK stocks reach new highs, should I sell up or hold on?

As US stocks soar to new heights and the FTSE 100 hits its 2021 high, are stocks and shares too expensive? Should I sell up and run for the hills?

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.

So far, this year has been great for investors in stocks and shares. As I write, the FTSE 100 index stands at 7,269.11 points, having hit its 2021 high of 7,281.17 yesterday morning. Meanwhile, the US S&P 500 index keeps on hitting record highs. Right now, it hovers around 4,591.91 points, having hit an all-time high of 4,598.53 earlier in Tuesday’s session. But as share prices and company valuations surge ever higher, stock markets often become increasingly fragile. So, with my family’s money largely invested in stocks, is it time for me to sell up and sit on the sidelines?

If I were to ask financial advisers whether to pull our money out of stocks, I know the answer I’d get. It’s very much in their interest to encourage people to invest more, so they’re highly unlikely to suggest the very opposite. Furthermore, financial pundits usually argue that timing the market — by selling high-priced stocks — is very difficult, if not impossible. But for me, it’s not so much about timing the market as keeping an eye on markets and doing what I feel is right, given the circumstances.

Market timing is very tough

Following the UK’s referendum vote to leave the European Union in June 2016, my wife and I discussed the consequences of this important event. We both predicted disruption and volatility in the aftermath of the Brexit ballot and decided this made UK shares much less attractive to own. Hence, we sold out of UK shares and reinvested the proceeds in US stocks. Following the wise advice of billionaire investment guru Warren Buffett, we were betting on America. This asset-allocation decision proved to be lucrative. Since the Brexit vote on 23 June 2016, the FTSE 100 index has gained just over 930 points. That’s an increase of 14.7%. Meanwhile, the S&P 500 has more than doubled, rising 117.3% over the same period. Wow.

My second bout of market timing came in late 2019, when my wife and I agreed that US stocks were looking historically pricey. As a result, we sold stocks and moved half (50%) of our portfolio into cash. We did this in anticipation of a market decline within the next year. Within months, Covid-19 went global and stock markets worldwide collapsed. Within days of ‘Meltdown Monday’ (23 March 2020), our 50% cash was once again invested in US stocks. Since its 2020 closing low of 2,237.40 points, the S&P 500 has more than doubled, soaring by 105.2%. Again, we’re very pleased with our decision to sell stocks, only to buy them back much cheaper months later.

Should I sell up today?

Recently, I’ve been warning my wife that, as the US market hits new heights, valuations look increasingly stretched. Right now, the S&P 500 trades on a price-to-earnings ratio of 30.5 and an earnings yield below 3.3%. What’s more, the index’s dividend yield is a mere 1.3% a year. These are some of the worst fundamentals I’ve seen in 35 years of investing (with the exception of the top of the dotcom boom in 2000).

On most market valuations, US stocks are strongly over-valued. Hence, with fundamentals this unattractive, we’re not increasing our exposure to the US. Then again, with the FTSE 100 looking undervalued in both historical and and geographical terms, we’re increasing our holdings of cheap UK shares. In short, we’re putting our money where we think it stands the best chance of making decent returns. For me, that market is cheap FTSE 100 stocks!

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

Front view of aircraft in flight.
Investing Articles

Is it game over for the BP share price rally?

The BP share price has looked like a one-way bet in recent weeks as oil and gas prices soar but…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

Amid geopolitical and AI risks, here’s how I’m positioning my ISA and SIPP in 2026

Edward Sheldon explains how he's allocating capital within his investment accounts and SIPP amid the various risks to the market.

Read more »

Young mixed-race woman looking out of the window with a look of consternation on her face
Investing Articles

My game plan for the next stock market crash

Markets have been surprisingly resilient during the recent Middle East conflict but we still cannot rule out a stock market…

Read more »

Concept of two young professional men looking at a screen in a technological data centre
Investing Articles

1 top growth stock to consider buying after it crashed 59%

This S&P 500 growth stock has fallen off a cliff lately due to AI software fears. Our writer thinks this…

Read more »

A mature woman help a senior woman out of a car as she takes her to the shops.
Investing Articles

Here’s how a 35-year-old putting £15 a day into an ISA could end up earning £18k+ of passive income annually!

A 35-year-old with no ISA but a willingness to invest relatively small sums could one day be earning many thousands…

Read more »

Young black colleagues high-fiving each other at work
Investing Articles

With the potential to double in 10 years, this could be a dividend stock to consider buying

With a yield of 7.2%, income investors might consider buying this stock. But reinvesting the dividends could deliver even more…

Read more »

Happy couple showing relief at news
Investing Articles

How much would someone need to invest in the stock market to target a £1,250 monthly second income?

Investing in the stock market can help deliver long-term wealth. But James Beard says it can also be a way…

Read more »

happy senior couple using a laptop in their living room to look at their financial budgets
Investing Articles

How much would someone need in an ISA to aim to treble the current State Pension?

Experts say the State Pension isn’t generous enough to provide a comfortable retirement. James Beard says the stock market could…

Read more »