Respect MP George Galloway's early day motion (EDM) to fight for full compensation for Arch Cru investors has gained 25 signatures so far.
The motion which was tabled last month with support form The IFA Centre, a trade body representing the interests of independent advisers, seeks to draw attention to the failure of the Arch Cru funds between 2006 and 2009.
It asks the regulator to hold fund manager Capita Financial Managers Limited (CFML) to account and to arrange full compensation for the 20,000 or so investors affected by the funds' failings.
Galloway's motion followed a rally of 650 MPs to discuss the issue, organised by Galloway and The IFA Centre in May.
The rally was aimed at educating MPs on how the Arch Cru investments worked, what the regulator at the time - the Financial Services Authority (FSA) - had done wrong and why many investors have joined a group action led by The IFA Centre against CFML to try to get compensation for their losses.
IFA Centre managing director Gillian Cardy said:"The Early Day Motion tabled by George Galloway now has 25 signatures and demonstrates significant cross-party support for the motion which condemns the failure of CFML and the FCA to compensate fully the 20,000 innocent people affected by the suspension of the UK authorised and regulated Arch Cru investment funds.
"It demands that the FCA act on its own handbook rules and enforce the remedies set out therein to oblige Capita to compensate investors."
The Financial Conduct Authority (FCA) issued a public censure against CFML last November for its failing in relation to the Arch Cru funds, however it stopped short of fining the company.
It said the company would not be able to afford the fine after it had contributed to a £54m redress scheme for investors.
It also said investors would receive up to 70% of their money back, however Cardy argued the figures were skewed.
"Recent correspondence from CFML to investors showcases exceptional creativity in the use of statistics and attempts to persuade investors, around 25% of whom have no recourse to the allegedly 'industry-wide' redress scheme, that a return of 60% of the suspension value of their investments is satisfactory. It is not.
"Simply accepting that 25% of investors will only get 60% of their investments returned demonstrates a failure in financial regulation that the FCA should be doing its utmost to correct, not defend."
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