SBI 720 CE spread 0.6 730 CE spread 0.7 740 CE spread 1.1 750 CE spread 0.8 760 CE spread 1.2 800 CE spread 0.1 700 PE spread 0.1 710 PE spread 0.4 720 PE spread 0.4 730 PE spread 1.3 740 PE spread 0.85