When did LNR Property Corporation spin off from Lennar Corporation and what was my cost basis at spin off?

LNR was formed by Lennar Corporation in June 1997 to separate Lennar’s real estate investment, finance and management business from its homebuilding business. On October 31, 1997, Lennar distributed the stock of LNR to Lennar’s stockholders in a tax-free spin off. The allocation of cost basis of Lennar shares as a result of the spin off was based upon the average of the opening and closing prices of each of the stocks on Monday, November 3, 1997. That allocation is 60.800604% to LNR and 39.199396% to Lennar. These percentages should be applied to the cost basis in Lennar before the spin off to determine the cost basis in Lennar and LNR after the spin off.