(Reuters) -Goldman Sachs surpassed first-quarter profit estimates, fueled by stock traders who capitalized on volatile markets to bring in record equities revenue, but the bank's CEO warned of a difficult environment ahead. The Wall Street bank joined rivals JPMorgan Chase and Morgan Stanley in reporting higher profits, but investors are more focused on future projections as tariffs increase inflation and recession risks. "While we are entering the second quarter with a markedly different operating environment than earlier this year, we remain confident in our ability to continue to support our clients," said CEO David Solomon, who noted the "great uncertainty" that hung over markets in the first quarter.