There is no right or wrong way to achieve life-changing passive income. For example, I might invest in buy-to-let properties or look for a high-yield savings account. Franchising is quickly gaining popularity among people looking for additional income.

But for me, there is no better way to make a gigantic second income than investing in London Stock Exchange. There are many different ways I can invest my money. I also don’t have to worry about the high startup costs or daily hassles that come with some other methods.

If I had a spare £9,000 and was able to add extra cash every month for 30 years, here’s my target: a regular monthly passive income of almost £1,400.

The effortless way

Given the forceful performance of UK share indices, I see no reason to invest my money elsewhere. The FTSE100Since its founding in 1984, the company has delivered a solid average annual return of 7%.

The FTSE250Meanwhile, over the long term, it delivered an excellent annual rate of return of 11%. Historical performance does not guarantee future profits, but these numbers are quite encouraging.

Choosing individual stocks to buy has its disadvantages. It is significant that investors conduct thorough research before investing and review their portfolios regularly. Reviewing company reports, economic data, brokerage notes and other resources is necessary to successful investing.

However, this should not discourage investors. The potential profits from the offer make it all worth it in my opinion.

What’s more, investors can reduce the amount of research they have to do by buying an exchange-traded fund (ETF) that spreads money across a broad basket of stocks.

The iShares Edge MSCI Global Quality Factor UCITS ETF(LSE:IWQU) is one such stock that I believe is worth sedate consideration.

The best fund?

This fund includes a subset of global stocks with solid performance “strong and stable profits“. Today, it holds shares in almost 300 companies, which also helps investors spread risk.

With a huge US bias – almost three-quarters of its holdings are US-based – it covers high-weight stocks including Nvidia, Apple, Visa AND Coca-Cola.

Some of its overseas holdings include the Danish pharmaceutical giant New Nordiskand Dutch technology group ASML. British holdings include: AstraZeneca AND RELAX.

A disadvantage may be the fund’s immense exposure to US technology stocks. A weighting of 24.17% could make it vulnerable in the event of a global economic downturn. However, in my opinion, the potential for forceful long-term returns makes it worth taking a closer look at.

This second income

Since its inception in October 2014, this iShares global ETF has delivered an average annual return of 11.02%. If this happens, a one-off investment of £5,000 today could turn into £134,337 after 30 years.

That’s good. But if I invested Just an extra £100 a month in the fund, I would earn an impressive £416,014. This would be enough to provide me with a passive income of around £1,400 per month (£1,387 to be exact), at an annual withholding rate of 4%.