A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
o
one-share one-vote rule
online banking
online broker
online trading
OPEC
open
open economy
open ended
open interest
open market
open market operation
open
The initial price of a given security or commodity in a trading session. Also known as opening.