July 1 (Reuters) - BlackRock BLK.N has launched a 'buffer' exchange-traded fund that seeks to offer a 100% downside hedge to risk-shy investors looking to tap the equity markets, the world's largest asset manager said on Monday.

So-called buffer or risk-managed ETFs help maximize returns from an asset for investors and simultaneously provide downside protection over a specific period.

The novel product will likely appeal to investors who are hoping to ride a rally in the stock markets as they continue to trade near record highs, but are concerned that a slowing economy and higher-for-longer interest rates can together hurt sentiment going forward.

Buffer ETFs also typically see lower redemption requests during times of heavy market volatility versus traditional ETFs tracking stock indexes.

"With record levels of cash sitting on the sidelines, many investors are looking for tools to help navigate market volatility before they step back into the market," said Rachel Aguirre, head of U.S. iShares product, BlackRock.

The iShares Large Cap Max Buffer Jun ETF MAXJ.Z started trading on Monday under the ticker symbol 'MAXJ' with a net expense ratio - expenses after waivers and reimbursements - of 0.50%.

The asset manager said the ETF will track the returns of the benchmark S&P 500 using options with an upside cap, while providing a 100% hedge to all downside for roughly a year.

BlackRock added that it now manages $25 billion in assets under management across more than 40 active ETFs in the United States, as of June 30.

(Reporting by Manya Saini in Bengaluru; Editing by Maju Samuel)

((Manya.Saini@thomsonreuters.com;))