(By Martin Hutchinson) Investment banks have gotten fat off the land since 1982, when the great U.S. bull market got its start. Their business has multiplied many-fold, and their earnings have soared into the stratosphere, to a level far higher than any other sector.

Now, JPMorgan Chase & Co.  (NYSE: JPM) has issued a report suggesting that investment-banking returns on capital will be sharply down over the next few years. Perhaps this will be only a moderate downturn.

However, there's also a good chance that labor-cost pressures – combined with tightening margins – will take the likes of JPMorgan and Goldman Sachs Group Inc. (NYSE: GS) down a path similar to that of General Motors Corp. (NYSE: GRM) and Chrysler Group LLP, both of which earlier this year declared bankruptcy.

Challenging Headwinds

JPMorgan anticipates that the regulatory changes that are likely to take place over the next year or so will reduce investment banks' return on equity (ROE) to around 11% – down from its previous forecast of 15%.

More capital will be needed for trading activity, which naturally reduces the return on capital from that activity. However, there will also be effects from new transparency requirements on derivatives. (Most – if not all – derivatives will have to be traded and cleared across central exchanges.) And tighter limits on commodities positions will prevent firms from cornering less-active markets.

This effect will be concentrated on investment banks themselves – firms such as Goldman Sachs and Morgan Stanley (NYSE: MS) – as well as on the investment banking activities of such firms as Credit Suisse Group AG (NYSE: CS), Deutsche Bank AG (NYSE: DB), Citigroup Inc.