Financial markets will be watching tomorrow to find out whether the trading loss at JPMorgan Chase is bigger than first reported.

The Wall Street investment bank comes out with its latest financial results after announcing on May 10 the $2 billion US loss.

Since then, analysts have speculated the loss is actually bigger.

JPMorgan has said it lost the money trying to hedge against financial risk.

That means the loss was its own, and did not affect any clients.

And despite the trading loss, it is still expected to report a quarterly profit of 76 cents a share on revenue of $21.8 billion.

But as the largest U.S. bank, the issue of how well it manages its risks is vitally important to the stability of the global financial system.

That’s why its loss is being investigated by government agencies and has prompted an appearance by CEO Jamie Dimon before U.S. lawmakers.

JPMorgan Chase CEO Jamie Dimon appeared before U.S. lawmakers on June 13 to explain the firm's trading loss. (Mario Tama/Getty)

JPMorgan has scheduled a conference call with analysts to start at 7:30 a.m. ET, two hours before the stock market opens.

The call usually happens at 9 a.m. The bank has also doubled the length of the call, to two hours.

Dimon is expected to provide an update. The briefing will also include chief financial officer Douglas Braunstein and Mike Cavanaugh, who leads a team of senior executives overseeing the loss.

Investors will want to know the latest on how the loss is being handled.

Bank analyst David Konrad at brokerage Keefe, Bruyette & Woods says clarity will be key.

"Management's ability to get the transaction behind the bank is more important than the actual size of the loss," Konrad says.

The trading loss has rattled the company's stock price, which has fallen more than 16 per cent, from $40.74 before the announcement of the trading loss, to its closing price on Thursday of $34.06.

"We expect a detailed account of what went wrong, what has changed and what is remaining," says Jason Goldberg, a bank analyst at Barclays Capital, a global investment bank.

Goldberg, like most investors and analysts, has no idea how deep JPMorgan's loss is. He said it could range from $2 billion to $9 billion.

With files from The Associated Press