NuScale Power looks like a better bet than Oklo, but neither stock belongs in any rational investor's portfolio.

Oil prices were little changed, edging slightly higher, as positive signs regarding a Russia-Ukraine peace deal pressured energy markets.

Sterling rose against the dollar and euro but could depreciate modestly as the U.K. budget is likely to deliver fiscal tightening measures that would lower inflation.

Ten-year gilt yields rose. Gilts are vulnerable as investors await U.K. economic projections during the budget statement amid concerns the estimates could be overly optimistic.