The euro was little changed at $1.1962 EUR= after shedding 0.7 percent overnight. They are expected to vote on the bill, which overturns the legislation that took the United Kingdom into the European Union, either late Monday or early Tuesday.
The PowerShares KBW Property & Casualty Insurance Portfolio (KBWP) spiked 5.2% in its biggest one-day gain since August 2011, but has recently pulled back somewhat.
Energy shares rose 0.8 percent as oil prices climbed.
Asian shares joined a global equities rally, hitting a 10-year peak on Tuesday with investors breathing a sigh of relief as North Korean fears eased slightly and the worst-case scenario from Hurricane Irma looked to have been avoided.
The anticipation of Irma making landfall in Florida initially raised concern over US economic growth.
British Land gained 1.67 percent and Deutsche Bank upgraded its rating on the stock to "Buy" from "Hold".
The dollar was bid and safe haven currencies were offered, reportedly on relief that North Korea didn't conduct another missile test over the weekend (which had been widely feared on Friday).
United States open: Wall Street jumps back towards record highs
The pharma firm's shares are yet to recover from a 15 percent plunge in July, when initial results from its advanced lung cancer study, known as Mystic, failed.
The 10-year US Treasury yield, which moves inverse to price, was up 5.2 basis points at 2.091 per cent, after hitting a nine-month low of 2.06 per cent on Friday.
Apple (AAPL.O) rose 1.5 percent to $161.07, giving the biggest boost to the S&P and the Nasdaq, a day ahead of the expected launch of its new iPhone. Home Depot dropped 1.29 dollars to 158.37 dollars and Lowe's declined 1.06 dollars, or 1.3%, to 77.50 dollars. Fundamentally, North Korea's troubles are not behind us because towards the end of the day, the country's foreign ministry said the USA will pay "due price" if new UNSC sanctions are approved.
The FTSE 350 non-life insurance sector was up 2.2% at midday, the best performing sector, while the FTSE 350 life insurance sector was the second best performer, up 1.5%.
The euro fell 0.67 percent to $1.1952 against the greenback, while the Japanese yen weakened 1.52 percent at 109.47 per dollar. Natural gas rose 6 cents to 2.95 dollars per 1,000 cubic feet.
In this environment, there was a measured dollar recovery against major currencies with USD/JPY moving back above the 108.00 level.
SPDR Gold Trust, the world's largest gold-backed exchange-traded fund, said its holdings fell 0.28 percent to 834.50 tonnes on Friday from 836.87 tonnes on Thursday.