BUZZ-Bodycote: leads FTSE 250 as top-ranked broker upgrades
** Engineer Bodycote boosted as Citi upgrades rating on stock to "buy"
** Citi sees current share price as good entry point (stock down c.8 pct from early March peak until Friday's close)
** Broker flags co's structurally growing margins from specialist growth technologies & balance sheet strength with potential for cash returns
** Citi rated at 5 stars for recommendation accuracy on Bodycote (LSE: BOY.L - news) , according to StarMine
** Shares (Frankfurt: DI6.F - news) , up 2.9 pct, among top FTSE 250 risers (RM (LSE: RM.L - news) : tricia.wright1.thomsonreuters.com@reuters.net)