Without the discount, nobody would buy the stock.
( ( Without ( the discount ) ) ( , ( nobody ( ( would ( buy ( the stock ) ) ) . ) ) ) )
(ROOT (S (PP (IN Without) (NP (DT the) (NN discount))) (, ,) (NP (NN nobody)) (VP (MD would) (VP (VB buy) (NP (DT the) (NN stock)))) (. .)))
Nobody would buy the stock if there wasn't a discount.
( Nobody ( ( would ( ( buy ( the stock ) ) ( if ( there ( ( was n't ) ( a discount ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Nobody)) (VP (MD would) (VP (VB buy) (NP (DT the) (NN stock)) (SBAR (IN if) (S (NP (EX there)) (VP (VBD was) (RB n't) (NP (DT a) (NN discount))))))) (. .)))