More broadly, the officials discussed "the difficulty of isolating the effects" of the bailout program "given the variety of policy actions taken by the US government to support financial stability and promote economic growth."
The officials also noted the "difficulties associated with monitoring the use of specific funds" provided to individual financial institutions, according to the document.
The bailout program, created Oct. 3, is designed to break through a debilitating credit clog and spur financial markets to operate more normally again.
Separately, Treasury said it will decide on a case-by-case basis whether other companies connected to the automotive industry should be provided emergency aid from the bailout pool.
President Bush reversed course on Dec. 19 and announced a $17.4 billion rescue package for teetering auto giants, General Motors Corp. and Chrysler LLC. GM said it received $4 billion in initial rescue loan checks from Treasury yesterday.
The government earlier this week provided $5 billion in aid to GMAC Financial Services and said it would lend GM up to $1 billion.
In deciding whether to aid others, the department said it will consider "the importance of the institution to production by, or financing of, the American automotive industry," and whether a major disruption of the companies' operations would likely hurt employment and the national economy.
In another report responding to questions from the top congressional watchdog overseeing the bailout, the Treasury Department defended its management of the program.
Paulson's decision to focus on providing banks and other companies with capital injections - rather than the original strategy of buying rotten assets from banks - was necessary to respond to quickly changing financial market conditions, according to the report.
Harvard law professor Elizabeth Warren, chairwoman of a congressional oversight panel, has said she didn't understand why it's taken so long for the Bush administration to explain its plan. The five-member panel has criticized Treasury for not saying exactly what problems they're trying to fix or how the investments will fix them.
