European stocks are set to open the final full week of May trading on the upside Monday even as investors continue to take a cautious approach to risk sentiment as the political upheaval surrounding U.S. President Donald Trump shows no signs of abating. 

Britain's FTSE 100 is slate for an early 27 point gain, according to financial bookmakers IG, while benchmarks in Germany and France are poised to add to last week's advances in the opening minutes of trading.

The anticipated gains are set to follow a solid session overnight in Asia, where stocks posted their strongest single-day rise in nearly a month thanks in part to a softer U.S. dollar and stabilizing oil prices.

A $20 billion deal in the European chemicals space is also likely to support markets at the opening bell, with Switzerland's Clariant AG (CLZNY) and Huntsman Corp. (HUN)  saying they had agreed to terms that will lead to a merger between the two chemical companies in deal that will be worth $20 billion.

HuntsmanClariant will have sales of around $13.2 billion, the companies said, based on pro-forma 2016 sales and adjusted operating profit of $2.3 billion. The deal is expected to close before the end of the year, the companies said in a statement.

The MSCI Asia ex-Japan index, the regional benchmark, was marked 0.9% higher by 06:45 BST while Japan's Nikkei 225 ended the session with a 0.45% advance to 19,678.28 points, even with the dollar's weakness pushing the yen higher in overnight trading.

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