Contrast the hyperactive stock with Berkshire. The bid-and-ask spread in our stock currently is about 30 points, or a little over 2%. Depending on the size of the transaction, the difference between proceeds received by the seller of Berkshire and cost to the buyer may range downward from 4% (in trading involving only a few shares) to perhaps 1 1/2% (in large trades where negotiation can reduce both the market-maker’s spread and the broker’s commission). Because most Berkshire shares are traded in fairly large transactions, the spread on all trading probably does not average more than 2%.
