** Shares of tax software solutions provider Vertex Inc
VERX.O down ~8% at $18.58
** Stock on track for biggest one-day pct fall in 4 months
** BofA downgrades to "underperform" from "neutral" on
slowing growth, negative margin leverage
** Cuts PT to $20 from $24, implying a downside of nearly 1%
to stock's last close
** Says co's ramped investment in marketing in recent years
has negatively impacted EBITDA margin but has not yielded
results
** Adds net revenue retention has slowed to 106% in Q2 2021
from 108% a year earlier
** Six of 8 brokerages rate the stock "buy" or higher, and
the rest "sell"; their median PT is $25
** Up to Friday's close, stock is down ~42%
(Reporting by Deborah Sophia in Bengaluru)
((DeborahMary.Sophia@thomsonreuters.com;))