Craigs Investment Partners broker Chris Timms said the House and Senate appropriations committees intended having a Bill ready by early in the week.
However, that did not leave a lot of room for disagreement or delays.
``The threat of a shut-down seems low at the moment. Nobody wants to experience the backlash that came in late 2013 when the government shut down in 16 days.''
That event was estimated to have cost $US1billion ($NZ1.42billion) a day, he said.
United States President Donald Trump earlier hinted he would have a ``big announcement'' on tax policy this week. The announcement on Thursday is expected to be broad policy only, rather than anything detailed.
The global reporting season hits its stride this week with nearly 200 S&P 500 companies set to report results for the March quarter,
Some of the big names include 3M, Caterpillar, Glaxo, Suncor, ExxonMobil and Republic Services.
Several technology ``heavyweights'' were also set to report, including Google, Amazon and Microsoft.
So far, 94 S&P companies had reported. Of those, 71% beat sales forecasts and 82% exceeded earnings expectations, Mr Timms said.
Apart from earnings and White House developments, the March quarter United States GDP data would be released on Friday.
Markets were expecting annualised GDP to slow to 1.1%, down from 2.1% in December.
``While this will make for a weak headline, the March quarter always seems to be disappointing in the first instance but regularly ends up getting revised higher over the following weeks.''
That had been the case in the past four or five years, he said.
As some scepticism crept in about whether the Federal Reserve would lift interest rates twice more this year, markets would take note of the detail in the Friday GDP report.
Fed vice-chairman Stanley Fischer suggested weakness in some indicators, such as inflation and retail sales, would not necessarily cause him to rethink the Fed's forecasts.
The central bank might well look through some of the waker data and could do the same even if GDP was soft, Mr Timms said.
