 Full-year results from Persimmon PLC LSE:PSN this morning cemented its position as the big beast in the house construction sector. The shares advanced 4.6 to 2,428p, taking the market capitalisation up to 7.4bn, a good 1.7bn clear of nearest rival, Barratt Developments PLC LSE:BDEV, 2.3bn ahead of Taylor Wimpey PLC LSE:TW. 