Global inflows to exchange-traded products hit a record $25.3bn last month, with year-to-date inflows of $67.2bn also the highest ever seen over an equivalent period, according to BlackRock.
ETP assets worldwide now stand at $1.67trn, a year's increase of 12.7%, of which ETFs account for nearly $1.5trn.
The European market continues to outpace other major regions, while alternative structures such as ETNs and ETCs are growing faster than ETFs.
Over half of April's net new assets went to developed equity ETFs, although emerging market exposures also appear to be making their comeback, pulling in over $5bn in new money.
The balance is still negative for the year, at net outflows of $1.7bn, but the direction of $3.4bn into broad emerging ETFs is indicative of a return of investor sentiment. This recovery is even more pronounced in Europe where $1.6bn, almost half the region's $3.6bn total new assets, went to emerging market funds.
All major ETF issuers have seen their assets increase significantly this year, with market leader iShares growing just over 10%. However, this has not been enough to protect the market share of a number of firms at the top, with the top four European providers all losing some of their dominance.
Meanwhile Source manages assets of just $7.4bn but has grown over 50% this year while Amundi ETF, which recently announced its first foray into the UK market, has also seen its expansion plans come to fruition with a year-to-date growth of 38%.
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