Decrease and Narrowing

noun

• A change downward.
  • usage: "there was a decrease in his temperature as the fever subsided"; "there was a sharp drop-off in sales"
  • synonyms: lessening, drop-off
• A process of becoming smaller or shorter.
  • synonyms: decrement
• The amount by which something decreases.
  • synonyms: decrement
• The act of decreasing or reducing something.
  • synonyms: diminution, reduction, step-down

verb

• Decrease in size, extent, or range.
  • usage: "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
  • synonyms: diminish, lessen, fall
• Make smaller.
  • usage: "He decreased his staff"
  • synonyms: lessen, minify

• (v.t.) To cause to grow less; to diminish gradually; as, extravagance decreases one's means.
• (v.) A becoming less; gradual diminution; decay; as, a decrease of revenue or of strength.
• (n.) To grow less, -- opposed to increase; to be diminished gradually, in size, degree, number, duration, etc. or in strength, quality or excellence; as, they days decrease in length from June to December.
• (v.) The wane of the moon.

noun

• An instance of becoming narrow.
• A decrease in width.
• The act of making something narrower.

verb

• Make or become more narrow or restricted.
  • usage: "The selection was narrowed"; "The road narrowed"
  • synonyms: narrow, contract
• Define clearly.
  • usage: "I cannot narrow down the rules for this game"
  • synonyms: pin down, peg down, nail down, narrow down, narrow, specify
• Become more focus on an area of activity or field of study.
  • usage: "She specializes in Near Eastern history"
  • synonyms: specialize, specialise, narrow, narrow down
• Become tight or as if tight.
  • usage: "Her throat constricted"
  • synonyms: constrict, constringe, narrow

adjective

• Becoming gradually narrower.
  • usage: "long tapering fingers"; "trousers with tapered legs"
  • synonyms: tapered, tapering
• Of circumstances. ( tending to constrict freedom).
  • synonyms: constricting, constrictive

• (n.) The act of contracting or of making or becoming less in breadth or extent.
• (n.) The part of a stocking which is narrowed.
• (p.pr.&vb.n.) of Narrow.
• (n.) The act of contracting or of making or becoming less in breadth or extent.
• (p.pr.&vb.n.) of Narrow.
• (n.) The part of a stocking which is narrowed.

Narrowing is the movement towards convergence between the cash and futures market or the cash and forwards market. Here, the price or interest rate differentials are becoming smaller over time between the comparative delivery dates.