TOKYO (Reuters) -Nomura Holdings Inc, Japan's biggest brokerage and investment bank, on Tuesday reported a jump in first-quarter net profit, driven by a strong stock market performance at home. Its April-June profit came in at 23.33 billion yen ($163.42 million) versus 1.696 billion yen a year earlier, when fears of slowing global economic growth sent financial markets into a tailspin and forced investment portfolio writedowns at Nomura. But the profit level is still subdued compared with Nomura's core pre-tax income target of 288 billion yen for the year to March 2025, a bullish g...