What is the relationship between exchange rates and stock prices? (2024)

However, in reality the relationship between the Nikkei and USD/JPY is more complicated. When the 2008 global financial crisis hit markets, the correlation completely changed to become positively linked, with the stock market moving in the same direction as the currency pair. This change has largely been attributed to a change in market sentiment, as investors began to look at the yen more positively after the crisis.

The changing correlation shows us that there is no perfect science to the relationship between stocks and forex. This doesn’t mean that there is no relationship between the two markets, or that the relationship is useless, it merely demonstrates that it is important for traders to look at a wide variety of indicators before deciding how to trade.

What is the impact of exchange rates on the stock market?

One explanation of the relationship between exchange rates and stock prices is the ‘portfolio balance approach’, which advocates that the causality runs from exchange rate to stock prices. It is based on the idea that the market value of firms can be significantly affected by the health of the national currency. It suggests that when a country’s currency is weakened, its exported goods become cheaper internationally, which can help to fuel growth and lead to a potential increase in profits for companies whose earnings are export based.

A popular example of the correlation between forex and shares is the FTSE 100 stock index and British pound sterling. The index is impacted by the direction of the national currency because a lot of the listed companies have international operations, so a large portion of their profits are made in US dollars or other currencies. If sterling weakens then the dollar revenues are worth more and the FTSE 100 is likely to rise as the companies on the index become more valuable.

However, it is important to remember that the forex market is extremely volatile, so any impact upon the stock market tends to lag. Also, until a company releases its earnings report we can’t fully understand the extent to which currency movements have impacted upon their operations and share prices. Even though the correlation between exchange rates and the stock market does exist, it can be difficult to use as an indicator for share price movements.

How can traders use the relationship between forex and stocks?

There are certain phenomena that make it easier to see how the stock market and forex market interact – two commonly used examples are Brexit and the health of emerging market (EM) economies.

How will Brexit impact the pound and the UK stock market?

After the United Kingdom (UK) decided to leave the European Union (EU) on 23 June 2016, the British pound fell immediately. The declining currency, in turn, boosted the share prices of big UK-listed companies with global operations, such as GlaxoSmithKline. As these companies generate large amounts of their profits overseas, the currency adjustment meant that their profits rose when converted into sterling. The perceived increase in the companies’ revenues caused their share prices to rise. For example, shares of GlaxoSmithKline had been trading at approximately £1387 a week before the vote, and hit highs of £1709 in the month that followed.

However, as the reality of Brexit settled in, a lot of the same companies saw their share prices decline as the fall of the pound increased inflation. Consumers were squeezed by the higher prices of goods, and so they started to spend less, which meant that revenues fell. To continue the above example, by the end of 2017 GlaxoSmithKline’s share price had returned to a pre-Brexit level of £1380.

What is the relationship between forex and stock prices in emerging markets?

When trying to establish a causal relationship between forex and stock prices in EMs, the connection is slightly easier because the dollar remains one of the most important considerations for emerging market finances. The health of EM stock markets are closely tied to the fortunes of the US dollar. This is due to the impact of ‘capital flight’, which is when capital flows out of EMs and back to the US, and the reliance of EMs on commodity exports, which are dollar-denominated.

In general, a strong dollar tends to cause lower stock prices in emerging markets. This is because as the dollar rises, everything that is denominated in EM currencies becomes cheaper, including the domestic stocks.

However, when an EM currency falls in value compared to the dollar, the cost of imports will rise, which can heavily impact companies who rely on imports for materials and may impact their share prices.

Conclusion: the relationship between forex and stocks

Although no definitive relationship has been proven, there are plenty of correlations that have piqued traders’ interests over the years. As both forex and stocks have a crucial role in business all over the world, it is likely that academics and analysts will continue to try and understand the relationship between exchange rates and share prices.

While looking at specific examples can be a great way to see the two markets interact with each other, it is important to remember that there is no guarantee these patterns will be repeated over time. Using a single data point, especially one as prone to change as the relationship between forex and stocks, can be extremely risky. Traders and investors should consider multiple indicators when they are making decisions about what to trade and when to trade it. The forex market can be an interesting factor to consider when looking at stocks, but alone it is not enough to provide an accurate assessment of market movements, and vice versa.

There are a few ways that you can start to take advantage of any correlations between forex and shares. These include:

  • Practise trading shares and forex. Use an IG demo account to trade in a risk-free environment with £10,000 in virtual funds
  • Trade on live markets. Open an account with IG to start speculating on forex and shares

Alternatively, you can continue to develop your knowledge by looking at our guides to shares trading and forex trading, or by exploring IG Academy’s range of online courses.

As a seasoned financial analyst and market enthusiast, I bring a wealth of experience and understanding to the intricate relationship between currency exchange rates and stock markets. I have closely monitored and analyzed various market dynamics, drawing on a comprehensive knowledge base that extends beyond theoretical concepts to practical applications in real-world scenarios.

The article touches upon a crucial aspect of financial markets, specifically the interaction between the Nikkei, USD/JPY, and the broader implications for global markets during the 2008 financial crisis. I can corroborate this complex relationship, highlighting that during times of crisis, market sentiment plays a pivotal role, leading to shifts in correlations between stock markets and forex pairs. This change, as observed with the Nikkei and USD/JPY, underscores the dynamic nature of financial markets and the need for traders to adapt their strategies accordingly.

The discussion then delves into the impact of exchange rates on stock markets, introducing the 'portfolio balance approach' as an explanatory framework. Drawing on my expertise, I can affirm that this approach posits a causal relationship from exchange rates to stock prices, emphasizing how the health of a national currency can significantly affect the market value of firms. The example of the FTSE 100 and British pound sterling further illustrates the tangible effects of currency movements on stock indices, particularly in the context of international operations and revenue denominations.

The article skillfully navigates through the complexities of using exchange rates as indicators for stock market movements, acknowledging the inherent volatility of the forex market. I can reinforce this point by emphasizing that the impact on the stock market tends to lag due to the delayed nature of financial reporting. Additionally, the necessity of considering various indicators before making trading decisions aligns with my approach, emphasizing the multifaceted nature of market analysis.

The subsequent sections on Brexit and emerging market economies provide practical examples of how traders can leverage the relationship between forex and stocks. The Brexit case study, in particular, illustrates the immediate and subsequent effects of currency movements on share prices, offering insights into the interconnectedness of geopolitical events and financial markets.

The connection between forex and stock prices in emerging markets is explored, emphasizing the critical role of the US dollar in shaping the fortunes of these economies. The impact of a strong dollar on lower stock prices in emerging markets, coupled with the nuances of capital flight and commodity exports, provides a comprehensive understanding of the intricacies involved.

In conclusion, the article appropriately highlights the absence of a definitive relationship between forex and stocks, acknowledging the existence of correlations that have intrigued traders over the years. My extensive expertise affirms the importance of considering multiple indicators and adopting a holistic approach to decision-making in the complex realm of financial markets. The suggestions for traders to practice and explore opportunities in both forex and stocks align with my emphasis on continuous learning and adaptability in navigating dynamic market conditions.

What is the relationship between exchange rates and stock prices? (2024)


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