S & L's will have to put up additional equity, which will provide greater insurance against bankruptcy.
"But even with additional equity," she said, "the acquisition will be additive."
The investor group has also agreed to provide $200 million in additional equity.
Those 18 would need $14.3 billion of additional equity to meet a projected 1992 year-end capital ratio of 4 percent.
The government has the right to purchase additional equity, but to date as not yet excised this right.
Eurotunnel has already been forced to raise additional equity once, in 1990.
When members leave the collective they retrieve their $1,200 but receive no additional equity.
"If additional equity is required, we stand prepared to do whatever is needed."
Owners of Marvel, including the bondholders, would get 60 percent, but only after paying $200 million for additional equity through a rights offering.
Without additional equity, Chrysler said further ratings downgrades were likely.