Aramco initially raised a $25.6 billion, which was itself a record level, in its December IPO by selling 3 billion shares at 32 riyals ($8.53) a share.
Shares drop as US President Trump's decision to sign a bill supporting Hong Kong's rights casts doubts over US-China trade deal.
London Stock Exchange Group formally rejected a takeover bid by the Hong Kong Stock Exchange, citing "fundamental concerns" over the bid.
US president's remarks came as the world's two largest economies prepare for new rounds of talks aimed at curbing a more-than-year-long trade war that has hurt global economic growth and rattled financial markets.
US bond yields up slightly after sharp fall in August, while European shares seen dipping slightly. Meanwhile, pound sterling drops to just below $1.2, its lowest level since January 2017.
Stocks plummeted amid worsening economic fears after US Treasury yields briefly flashed a warning sign for a coming recession.
The Wall Street bond yields hit their lowest since 2017. Dow Jones is down 0.93%, with the S&P 500 down 0.85%, and Nasdaq down 0.39% as well.
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