From Longman Business Dictionary
pegpeg /peg/ verb (pegged, pegging) [transitiveT]FINANCE1to fix something such as prices or wages at a particular level, or fix them in relation to something elsepeg something at somethingThe prices of many holidays have been pegged at last year’s levels.
peg something to somethingcurrencies which are pegged to the dollar
—peg noun [countableC usually singular]Banks use the base rate as a peg to set interest rates on loans.
2American EnglishAmE to state what you believe an amount to be or what you believe will happenpeg something at somethingSome analysts peg the losses at $125 million.
peg somebody as somethingOpinion polls peg him as her likely successor.