** Shares of FedEx FDX.N down about 6% at $299 in extended trading after company reports margin drop in core express segment

** Forecasts EPS of $16.90 to $18.10 for the year, as it shifts its fiscal year to align with the calendar year from its previous May year-end

** Co reports Q4 adjusted EPS of $6.31 vs. est. of $5.96 - LSEG data

** Its Federal Express segment margin down to 7.7% from 8.4% a year earlier

** Q4 revenue up 12.6% at $25 billion, above expectations of $24.04 billion

** Including session's moves, shares up 36.4% YTD