0649 GMT - Bitcoin rises after President Trump announced an energy ceasefire between Ukraine and Russia. Ukraine President Volodymyr Zelensky said the deal was "news to me" but would agree if Russian President Vladimir Putin did the same. "Markets open Monday with a tentative improvement in risk appetite as softer oil prices offer some relief from inflation concerns, despite renewed attacks on Saudi Arabia," LMAX Group's Joel Kruger says in a note. The Russia-Ukraine news has encouraged hopes of easing pressure on fuel markets, he says. However, the ceasefire remains disputed, while Iran-backed Houthi attacks on Saudi infrastructure highlight the continuing threat to regional supplies, he says. Bitcoin rises 0.3% to $83,893, LSEG data show.