Correct

增持

/ zēng chí / 
Strokes

Example

As a Verb

(of investors) increase one's shares in a listed company

1
Zēngchí
增持
yínháng
银行
bǎnkuài
板块

overweight the banking sector

2
Zēngchí
增持
gāngtiě
钢铁
zǔhé
组合

overweight portfolios in steelmakers