One position in particular, in Allco Finance shares, received a margin call from ANZ Bank and when Tricom could not meet it, ANZ and Tricom's other lenders forced the broker to reduce the size of its loan book. Part of the book was shifted over to Opes Prime, which itself collapsed weeks later. In the meantime, Tricom's major client Babcock & Brown tipped in $35 million to keep the broker afloat. Fearing it would lose another margin lending client, the ANZ also took the unusual step a few weeks ago of injecting cash into Tricom itself.