Investor who's up more than 50% this year says to identify next-gen companies and stick with them

Tesla Inc CEO Elon Musk attends an opening ceremony for Tesla China-made Model Y program in Shanghai, China January 7, 2020.
Aly Song | Reuters

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Baillie Gifford's market-beating approach for its long-term global growth strategy is simple: identify resilient companies addressing big opportunities and stick with them through the ups and downs.

So far, this strategy has been a winning one. The Baillie Gifford Long Term Global Growth Fund has surged more than 50% this year, compared with the S&P 500's 1% drop. Over the past year, as well as the last three years, it's also handily beat the index, gaining 68% and 100%, while the S&P has returned 6% and 30%.

The fund has outperformed 99% of its competitors since its launch, according to data from Morningstar, thanks to concentrated positions in names like Tesla and Amazon.