必ずしも市場にいる必要はない

かならずしもしじょーにいるひつよーはない

(market maxim) it is not necessary to be in the market all the time (it takes time to calmly observe)

必ず

かならず

always, without exception, necessarily, certainly, without fail, positively, invariably

必ずや

かならずや

certainly, surely, definitely

必

ひつ

definiteness, certainty

必要なし

ひつようなし

not required

必殺

ひっさつ

bringing certain death, deadly, knockout (blow)

必見

ひっけん

must-see, not to be missed, a must

必食

ひっしょく

must-eat

必治

ひっち

certain cure

必衰

ひっすい

bound to decline, decay, or collapse

必置

ひっち

mandatory requirements (e.g. qualifications, administrative structures, etc.)

必罰

ひつばつ

inevitability of punishment

必着

ひっちゃく

must arrive, must be received

必定

ひつじょう

inevitably, certainly

必須

ひっす ひっしゅ ひっすう

indispensable, required

必需

ひつじゅ

necessary

必中

ひっちゅう

hitting the target

必達

ひったつ

certain fulfilment

必読

ひつどく

must-read, obligatory reading