United Kingdom — European stock markets rose on Wednesday as investors cautiously awaited a key Federal Reserve (Fed) interest rate decision and digested a raft of earnings.

London shares climbed 0.3 per cent in late morning deals, with Barclays soaring almost 3 per cent on news of surging first-half profit at the UK bank.

Frankfurt also won 0.3 per cent and Paris jumped 0.9 per cent in early afternoon eurozone trade.

Madrid added 0.7 per cent but Santander stock shed 0.8 per cent despite the Spanish lender revealing that it rebounded into bumper quarterly profit.

The Fed's monetary policy meeting ending on Wednesday was closely watched for any guidance on its plans in light of the economic recovery, reopening and spread of the Delta coronavirus variant that has sent infections spiking.

"As always, investors will want to know the central bank's latest view on the outlook for the US economy and whether it is time to tinker with policy support measures,” said AJ Bell analyst Danni Hewson.

"The spread of the Delta virus variant in recent weeks and months could give the Fed reason to make no changes to its policy, but any sign of taking a more forward-looking view and wanting to taper bond purchases could cause ripples across global markets."

Investors were underwhelmed by better-than-expected earnings from US tech titans Apple, Google-parent Alphabet and Microsoft.

Apple's third-quarter profit rose to $21.7 billion on growth in iPhone sales.

Asian markets mostly fell again on Wednesday as fears over China's regulatory crackdown continued to reverberate around trading floors, following losses on Wall Street.

Hong Kong and Shanghai were in focus after suffering a diabolical previous three days in the wake of Beijing unveiling a series of measures aimed at curbing a range of industries — including tech and private tuition — that have raised fears of further action.

Hong Kong rose more than 1 per cent having oscillated wildly but it made only a small dent in the more than nine per cent drop suffered over the previous three days.

Bitcoin sat around $39,500 following a recent rally that has helped it briefly break $40,000, helped by renewed support from tycoon Elon Musk and other investors, with some analysts saying it could test $45,000 again soon