Its January-March net profit came in at 1.95 billion yen ($15 million) versus 16.3 billion a year earlier, the unlisted brokerage arm of Sumitomo Mitsui Financial Group Inc said.

SMBC Nikko and six former executives have been indicted on market manipulation charges for its purchase of 10 individual stocks on the market, allegedly to push up their prices and ensure block trade deals in them did not fall through.

A company executive told an earnings briefing that the revenue impact from the market manipulation was about 10 billion yen for the year that ended in March, as some institutional investors and companies suspended orders.

The company, now making its own investigation, said this month it could not deny faults in its internal management structure and was aware it could not escape its responsibilities.

($1=129.9900 yen)

(This story corrects number of indicted ex-execs to six from five in paragraph 3)

(Reporting by Makiko Yamazaki; Editing by Clarence Fernandez)