When Jay Jacobs, director of research at Global X, was looking to start new theme-based exchange-traded funds last year, a robotics and artificial intelligence ETF just made sense.

"I think a lot of times the finance world gets lost in its own jargon of risk adjusted returns and Sharpe ratios and risk factors," Jacobs told Markets Insider. "The story behind robotics and AI is very straightforward to everybody."

Jacobs is the mind behind the BOTZ, an exchange-traded fund from Global X which launched in September of 2016. BOTZ invests in companies that gain a majority of their revenue from robotics and artificial intelligence. The fund's market capitalization recently crossed over the $300 million mark.

The explosive growth of BOTZ makes sense. It combines the red-hot ETF market with skyrocketing tech stocks. Jacobs says it's the fastest growing funds he's been involved with in his four plus years with Global X. With returns of around 39.1% since the fund's inception last year, the growth is hardly surprising. 

BOTZ is comprised of 29 companies spread across four sub categories: industrial automation, non-industrial robotics, unmanned vehicles and artificial intelligence. It's weighted by market cap, with no single company comprising more than 8% of the fund, and no less than 0.3%, according to Jacobs.

The largest holding is currently Mitsubishi, followed by Nvidia and Keyence Corp, each making up about 7.5% of the fund. Those top three holdings are up an average of 77.4% since the inception of BOTZ. 

Global X has positioned BOTZ to be popular among a younger investing crowd. A strong majority of millennials, about 83%, are interested in thematic investing, compared to only 31% of the general population, according to a study done by the firm. When creating BOTZ, Jacobs said he had millennial investors in mind. 

"We see that younger generations are the trendsetters, so if we see that millennials are the ones saying [AI] is real ... that's meaningful and it's going to start working its way up the chain," Jacobs said.

Formatting the fund as an ETF made sense as well. The ETF market for stocks has grown by 500% in the last eight years, in part because it allows for easy access to themes like AI and robotics. Investing in the fund is as easy as buying a stock.

"You get international exposure, which is critical for robotics," Jacobs said. "You get diversified exposure."

There are drawbacks to the Global X approach. Almost half of the fund's holdings are based in Japan, meaning events in the country could have an outsized effect on the fund. The fund is also missing some major players in AI, like Facebook and Google, which are leaders in artificial intelligence technology but excluded from the fund because they don't derive most of their revenue from the theme.

Still, a thematic fund like BOTZ allows investors to bet on a general idea instead of a specific company, which investors seem to like.

After all, "tech is only going to get better," Jacobs said.

NOW WATCH: Wells Fargo Funds equity chief: Companies were being rendered obsolete long before Amazon emerged

See Also:

• These 15 little-known perks show why Amazon Prime is so much more than free shipping
• 5 members of Trump's manufacturing council left after Charlottesville — here's who's still on it
• This is the MacBook accessory that’ll make getting work done on your laptop a lot easier

SEE ALSO: The world's hottest investment market looks like a bubble — but it still has a ways to go