BUZZ-Spire Healthcare: poised for worst day since IPO, outlook weighs
** Spire Healthcare (LSE: SPI.L - news) slumps more than 13 pct on expectations of near-term weakness in NHS demand for the year
** Stock, poised for the worst day since its IPO last July,
pares nearly the entire gains over the past month
** Top loser on FTSE-250 Midcap Index and FTSE All Share Health Care Index
** Investec (LSE: INVP.L - news) says NHS sales growth of 14.1 pct was disappointing
** The brokerage expected strong volumes but these do not appear to have materialized
** Spire Healthcare says it will pay maiden dividend of 1.3p
** Nearly half of Spire (Stuttgart: SIZ.SG - news) 's daily average volume traded in the first 30 minutes of trade (aashika.jain@thomsonreuters.com)