JP Morgan Chase & Co. is the United States' biggest bank by assets and has been hit hard by legal costs as it has been defending government probes and other legal issues.

In response to a question about legal costs, the bank's Chief Executive Jamie Dimon has said that JP Morgan and other banks "are under assault" recently on a call with reporters, Reuters reports.

In November, JP Morgan agreed to pay a $1 billion penalty for the way it conducted business in foregin markets. Investigations on JP Morgan's business practices in other sectors are still ongoing.

The bank has been accused of manipulating Libor interest rates.

"We have five or six regulators coming at us on every issue," Dimon added.

Goldman Sachs analysts have suggested that JP Morgan Chase & Co. should be broken up.

Dimon does not agree with that suggestion.

("That) would be extraordinarily complex," he said, adding that the bank has plenty of help from various businesses should difficulties arise in certain sectors of the bank, like housing, for example.

With a total of $2.9 billion in legal costs in 2014, JP Morgan also saw its earnings fall in 2014. With all these bad figures being released to the public, JP Morgan's share price sunk in mid-day trading, down 5.5 percent. In late-day trading, the stock is still down over four percent.

JP Morgan is a popular stock on Wall Street, but with its heavy exposure to some troubled areas, most analysts recommend other bank stocks. Most analysts recommend buying stock in American Express, Disocver Financial Services or U.S. Bancorp rather than JP Morgan.

JP Morgan was also breached by hackers. In October, over 83 million customers' information was hacked into.

What do you think about all of JP Morgan's troubles with legal costs?

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