(BFM Stock Exchange) – Loyalty would be as important in terms of investment as in a romantic relationship, according to an analysis of the trading and investment platform ETORO.

As in romantic relationships, loyalty in investment is generally rewarded, according to a study* from Etoro. The broker wrote this study on the occasion of the Valentine’s Day, which took place on Friday February 14, this feast celebrating the patron saint of lovers.

For the broker, investors who engage in the long term are likely to have a fruitful relationship with their portfolio. By analyzing the yields of the S&P 500 between 1871 and 2025, Etoro observes that the probability of obtaining a positive yield while retaining the star index of managers for one year is 72%. This probability rises to 87% if he is held for 10 years, and 95% for 20 years.

As in life, there are ups and downs

Similar trends are observed in data relating to the British FTSE 100 index, also notes the broker, with a probability of a positive return from 66% for a single year and to 83% over a period of 20 years.

“As the proverb says, it is better to stay on the market than to predict it. There are ups and downs in investment, just like in romantic relationships, and it is therefore important not to always sell in Panic at the first alert sign … “, comments Lale Akoner, world market analyst at Etoro.

However, not all relationships are intended to last, tempers Etoro. By leaning on the performance of the Stoxx Europe 600, the investment platform notes that the pan -European index offers 66% chance of generating a positive yield over a year, a probability that fits over time, falling to 61% over 10 years and 47% over 20 years.

“That said, not all clues are built in the same way, and staying longer on the Stoxx 600, a gloomy index, would not have the same effect. This does not mean that investors should not flirt With Europe – after all, holding it between one and ten years would still give you a chance of profit of more than 60 %. Long -term commitment, “continues Lale Akoner.

Five beautiful long -term stories

Etoro’s data also highlights the benefits that there is to remain faithful to its investments during difficult periods. Companies such as Broadcom, Arista Networks and TSMC have delighted loyal investors, after their titles displayed a marked increase as a result of significant folds between 50% to 60%.

The broker quotes the example of Broadcom who experienced a difficult period, with a collapse of his course of 53% between January and March 2020, before winning back the heart of investors and displaying hearty gains of 2.108% over ten years , when it reached its highest historic level in January 2025, more than $ 237.

The semiconductor specialist was the revelation of the end of 2024, enjoying booming opportunities in AI since its Ethernet chips and Xpus processors are adapted to uses requiring significant computing power.

This hypercroissance and these promising prospects allowed Broadcom to cross the symbolic bar of the $ 1,000 billion in market capitalization (the value of all of its actions), mid-December 2024. Only eight American groups had accomplished this feat before Broadcom.

Etoro also cites the somewhat hectic history of the Arista Networks group which has registered an increase in the course of 3.152% over 10 years despite a dive of 53% between April 2019 and March 2020. Like Broadcom, this American company specialized in The network infrastructure took advantage of the development of demand for AI.

“Even companies with solid fundamentals, a competitive advantage and a growth potential supported by long-term macro-tendencies can go through difficult periods. Investors who support them against very and tides can ultimately Be rewarded for their patience and commitment, “added Lale Akoner.

Explanation of the infographic: the “fall” bar corresponds to the maximum drop in the action, that is to say the difference between the lowest course reached and the previous one above. The “increase” bar corresponds to the progression that the action has experienced since it fell to this lower. Example: Arista Networks recorded a “fall” of 53% over the period from April 2019 to March 2020. The action then experienced an “increase” of 1,290% since March 2020.

Stories that broke the hearts of investors

Conversely, Etoro’s analysis also highlights the dangers of being carried away by fashion effects. The broker quotes the example of Peleton, the New York company specializing in connected bikes which had been the star of confinement despite prices between $ 2,000 and $ 4,500.

Between the low market point in March 2020 and early 2021, the interactive peloton rating increased more than 860% on the American NASDA, before collapsing by 98% between January 2021 and April 2024. Its course is today ‘today Hs far away from what it was during its IPO in September 2019, recalls Etoro.

The broker also looks back on the Californian Zoom videoconference services company, another confinement star who had seen his course explode with travel restrictions. Its action had flambé by more than 850% between November 2019 and October 2020, before then to fall by 90% between October 2020 and July 2024.

Explanation of the infographic: the “rally” bar corresponds to the progression that has recorded an action between its highest historical and its previous low point. The “fall” bar corresponds to the maximum fall that the action has accused since it reached this historic summit. Example: Peloton jumped between March 2020 and January 2021, recording a “rally” of 870%. The title then accused a “fall” which reached its maximum in April 2024 (-98%) compared to this higher historical.

“The titles of our list of short -term flirts’ first prospered during the COVIR, taking advantage of the development of remote work, home training sessions and pet possession. However. , the honeymoon phase was quickly run out of steam with the softening of confinement measures. May the situation become toxic, “concludes Lale Akoner.

*Etoro analyzed the yields of the S&P 500 from 1871 to 2025, FTSE 100 from 1710 to 2025 and the Stoxx 600 from 1987 to 2025 using data from Bloomberg and the Federal Reserve Bank of St. Louis. Individual data on actions come from refinitiv.