By Lars Mucklejohn Goldman Sachs, Bank of America (BofA) and Citigroup all surpassed analysts’ estimates for their third-quarter earnings on Tuesday thanks to strength in their investment banks The Wall Street giants have benefited from a pickup in dealmaking activity that bankers are hoping is the beginning of a sustained rebound following a torrid 2023. Top US lenders are leaning more on their investment banking arms to bolster profitability as they grapple with falling interest rates. Banks’ net interest income (NII) – the difference between what banks pay on deposits and earn from loans an…