One possible explanation is that surging household wealth in recent years contributed to the virtual disappearance of personal saving.
( ( One ( possible explanation ) ) ( ( is ( that ( ( ( surging ( household wealth ) ) ( in ( recent years ) ) ) ( contributed ( to ( ( the ( virtual disappearance ) ) ( of ( personal saving ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD One) (JJ possible) (NN explanation)) (VP (VBZ is) (SBAR (IN that) (S (NP (NP (VBG surging) (NN household) (NN wealth)) (PP (IN in) (NP (JJ recent) (NNS years)))) (VP (VBD contributed) (PP (TO to) (NP (NP (DT the) (JJ virtual) (NN disappearance)) (PP (IN of) (NP (JJ personal) (NN saving))))))))) (. .)))
The disappearance of saving couldn't possible explain the recent uptick in household wealth in recent years.
( ( ( The disappearance ) ( of saving ) ) ( ( ( could n't ) ( possible ( ( explain ( ( the ( recent uptick ) ) ( in ( household wealth ) ) ) ) ( in ( recent years ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN disappearance)) (PP (IN of) (NP (NN saving)))) (VP (MD could) (RB n't) (VP (ADJP (JJ possible)) (VB explain) (PP (NP (DT the) (JJ recent) (NN uptick)) (IN in) (NP (NN household) (NN wealth))) (PP (IN in) (NP (JJ recent) (NNS years))))) (. .)))