Westpac backed up its capital raising and home loan rate rise announcement with the release of its unaudited 2015 full-year result. The Group's full year results will be announced on 2 November.The preliminary numbers outlined yesterday by Westpac CEO Brian Hartzer were in line with market expectations. Overall cash earnings increased to A$7.8 billion from $7.6 billion, up three per cent. Non-interest income was flat at $6.3 billion while operating expenses were up five per cent to $8.6 billion.On a cash earnings basis, net interest income was up six per cent to $14.2 billion and the net interest margin (leaving out the Treasury and Markets divisions) was almost flat - an increase of just two basis points to 2.03 per cent.Westpac's cost to income ratio was 44 bps higher at 42.0 per cent. S&P observed that asset-quality trends continued to improve, with stressed assets down 15 per cent, but impairment charges were higher as the benefits gained from a stress reduction were lower.Other key measures included Australian credit card delinquency rates, which were steady at 0.81 per cent while auto delinquency rates were higher at 1.00 per cent. Westpac's entitlement offer follows other major Australian banks which have all raised fresh capital totalling A$17 billion from the market, and first since Commonwealth Bank of Australia announced a capital raise of $5 billon on 12 August 2015.The CBA move, in turn, had followed a $3 billion capital increase by Australia and New Zealand Banking Group on 6 August 2015 - all coming after the initial $5.5 billion capital raising by National Australia Bank in May 2015. The end result will be - especially if the majors follow Westpac's lead in raising mortgage rates - a maintenance of the status quo, with ROEs across the sector virtually unchanged.