Shares of Goldman Sachs dropped Monday despite the Wall Street giant posting a blockbuster first-quarter profit, as investors zeroed in on weak spots beneath the headline numbers. The stock dropped roughly 2% intraday after initially plunging more than 4% at the open — even as the bank reported earnings and revenue that topped expectations. Investors also weighed the potential impact of the Iran conflict on dealmaking and market activity. Goldman posted net income of $5.63 billion on revenue of