** Canadian financial technology firm's shares down 41 pct at 4-year-low of C$16.91; biggest slide ever
** Reports Q3 adj. EPS of 49 Canadian cents, lower than analysts' average estimate of 60 Canadian cents
** Revenue C$417.7 mln below estimate of C$429.5 mln
** More than 2 mln shares traded, 7.8x 30-day avg
** At least 3 brokerages downgrade ratings on stock; highest PT cut by RBC to C$26 from C$48; median PT is C$32
** "While D+H's cash flow generation improved dramatically on a sequential basis, the faster-than-expected decline in the Canadian payments business, which includes the cheque business, had a significant impact this quarter and is not anticipated to recover," Dundee Capital analysts write in a note
** 3 of 10 brokerages covering the stock rate "buy" or higher, 5 "hold" and 2 "sell"
** Up to Tuesday's close, stock had fallen 9.2 pct this year (Reporting by Ismail Shakil in Bengaluru)