The sides are pushing to reach a deal this week, according to people briefed on the union's strategy.
A series of regulatory fines against senior officials is expected soon, according to several people briefed on the matter.
The people briefed on the company's status said that deal seemed to have very little chance of success yesterday.
The people briefed on the situation said that the guarantees now appeared to total closer to $3 billion.
But in recent days, the investigation has expanded well beyond one transaction, said the two people briefed on the matter.
That drove the bank to the bargaining table, according to two people briefed on the matter.
A bankruptcy filing could come this morning, according to people briefed on the plans.
Citigroup is expected to cut 10,000 to 12,000 jobs this year, according to people briefed on the situation.
The notification was confirmed by the four people briefed on the results.
It lost 1.7 percent in 2002, but rose 15.3 percent last year, according to people briefed on its results.