Stocks and Shares ISA in the red? Here’s how I’d react

After seeing the value of some holdings in his Stocks and Shares ISA crash, our writer reflects on how he could react as a long-term investor.

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.

Mindful young woman breathing out with closed eyes, calming down in stressful situation, working on computer in modern kitchen.

Image source: Getty Images

It can be alarming to invest money hoping to see it increase only to see it disappear. That happens to most investors at some point, as markets go down as well as up. Sometimes, looking at my Stocks and Shares ISA, I see its value is in the red. That could be alarming – so here is what I do.

Understand paper losses

Stock markets move up and down, as do individual shares. The valuation of a portfolio, such as that held in a Stocks and Shares ISA, is usually a snapshot of the money I would expect to get if I sold the shares today. But if I do not sell, a negative valuation is only what is known as a paper loss.

As the name suggests, it exists on paper (or a screen). If I sold at the current price, I would make a loss. But I can keep owning the shares and doing nothing. If they move up in price, my ISA may move into the black again. Then again, they might not recover. Shares that fall can keep falling.

A valuation is a summary of what the whole universe of investors thinks my portfolio is worth right now. I actually think that is valuable information for me to have even if it makes for difficult reading. Indeed, it might lead me to re-evaluate some of my investment decisions. Crucially though, the paper loss does not mean I have actually lost money — unless I sell the shares at such a price.

Revisiting investment cases

But imagine that a share in my ISA is showing a huge loss – maybe it is 50%, 70% or even 90% lower in price than when I bought it.

Although that does not mean I have actually lost money if I have not sold any shares, it certainly would grab my attention. Imagine a share fell 90%? Sadly I do not need to imagine this, as the past year has seen the share price of my holding Renalytix tumble 89%. So basically, if the market reckons a share is worth just one tenth of what I paid for it, what does that tell me about its valuation?

Reshaping my Stocks and Shares ISA

Either I have overvalued it, or the market overall is undervaluing it. We cannot both be right.

Therefore, a large fall could be a trigger for me to revisit the investment case for a particular stock. If things have changed that affect how I value a share, such as a worse profit outlook, maybe I will think the price drop is justified. In that case I may decide whether I want to keep holding the shares, or act on the changed investment case and sell at a loss. Doing the latter can be painful, but less costly than selling at an even bigger loss further down the line.

What if I think nothing fundamental has changed in the investment case but the shares are now much cheaper than they were? In that case, I may decide to use the price drop as a buying opportunity to add to my position, while never letting any one single share become too dominant in my ISA.

Christopher Ruane owns shares in Renalytix. 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

Investing Articles

Is this the best time to invest in a Stocks and Shares ISA – or the worst?

Investors looking to use this year's Stocks and Shares ISA may be deterred by current market volatility but this could…

Read more »

Fireworks display in the shape of willow at Newcastle, Co. Down , Northern Ireland at Halloween.
Investing Articles

I asked ChatGPT if the FTSE 100 would hit 12,000 before 2027

Is the 12,000 mark possible for the FTSE 100 in 2026? Let's take a quick look at what ChatGPT has…

Read more »

DIVIDEND YIELD text written on a notebook with chart
Investing Articles

With an 8.8% yield are Legal & General shares a once-in-a-decade opportunity?

Legal & General shares are back to where they were a whole 10 years ago. Harvey Jones is tempted by…

Read more »

Young female hand showing five fingers.
Investing Articles

5 shares close to 52-week lows. Could they rise in value by 44% over the next year?

Identifying value shares is the key to investment success. These five UK stocks are trading close to their 52-week lows.…

Read more »

Black woman using smartphone at home, watching stock charts.
Growth Shares

Up 25% in a month, this growth share is flying despite the market falling!

Jon Smith points out a growth share that's bucking the broader market trend in recent weeks, with momentum potentially continuing…

Read more »

British flag, Big Ben, Houses of Parliament and British flag composition
Investing Articles

£20,000 invested in a Stocks and Shares ISA on 7 April is now worth…

The Stocks and Shares ISA is a proven wealth-building machine. But was one year ago a great time to be…

Read more »

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

The stock market hasn’t crashed yet. Make these 3 moves before it does

If an investor is prepared for a stock market crash they can soften the blow, and more importantly, capitalise on…

Read more »

Investing Articles

£1,000 buys 300 shares in this red-hot UK gold stock with a P/E ratio of 3

This UK-listed gold stock is on fire at the moment amid the historic rally in precious metals. But it still…

Read more »