In its monthly UK Fund Flows report, Lipper recorded £7.5bn worth of outflows from UK equity funds.
By contrast, money market funds received £4bn in inflows, which Dewi John, LSEG Lipper head of research, UK & Ireland, said was "as startling" as the equity figures.
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"The UK market has bucked the international trend of positive flows to these vehicles over the year, spurred by the decent yield on cash and bruising bond market conditions," he said.
"UK cash funds, in contrast, have haemorrhaged cash over the year - the exceptions being March and June, at £3.38bn and £71m, respectively."
John said this was "almost certainly" the result of pension funds redeploying assets in the wake the Mini Budget LDI crisis.
"Do October's figures signal the end of that process? I had signalled a definite ‘maybe' in March and proved to be rather premature," John said.
October 2022 saw inflows of £69.3bn, while outflows to September 2023 totalled £68.3bn, "so that would make sense" he added.
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Fixed income also suffered a negative period, with bond funds experiencing net redemptions for the first time since March this year, losing £634m.
This has not knocked them from the top spot in terms of inflows though, as the asset class has attracted £10.6bn in inflows year-to-date.
Both the alternative and real estate focused assets followed the outflow trend, with the former shedding £593m and the latter down £123m.
On the passive front, bond ETFs were positive in the period, gaining £1.1bn net inflows, surpassing equity ETFs' £194m.
In contrast to active funds suffering £7.5bn worth of redemptions, their passive peers shed just £2.7bn (both excluding money market funds).