Quoting Prof. Gian Giacomo Migone’s The United States and Fascist Italy, page 164:

Lamont, too, had always been perfectly conscious of the real balance of power in the field. His decision not to travel to Rome in May 1926 had been, in the final analysis, the most discreet and clear signal to the minister that he needed the Morgan Bank more than the bank needed him. Lamont knew very well that only vigorous American support would allow the Fascist government to succeed in stabilizing its currency — a success that was fundamental to the internal and external consolidation of the régime.

He also knew that American support would only be channeled through the auspices of Morgan Bank, which at that moment controlled [Fascist] access to the American financial market. It was true that precisely this fact conditioned the Morgan Bank’s strong interest in assuring the successful stabilization of the lira. But to Volpi it was clear that he had no alternatives to the relationship with Morgan Bank, as the other American banks had recently given ample demonstration.

(Emphasis added.)

‘The US capital market in particular became the main foreign source of financial supply of the Italian industry.’ — Luciano Segreto