Which preposition to use with consol

at Occurrences 2%

They sold consols at Law's bank, and were paid in his bills, with which they bought shares.

for Occurrences 1%

Again, in time of war or general disturbance, a man may require ready money at once, and have to sell out his investments in land or consols for a third or even a still smaller fraction of the sum he would have received from them, if he could have waited for the market to right itself, which would have happened in due course; but he compels Time to grant him a loan, and his loss is the interest he has to pay.

Which preposition to use with  consol