title('Annex 1: S&P 500 and performance indicators','FontSize',24);
ylabel('Indice evolution - Zscore','FontSize',16);
xlabel('Date','FontSize',16)
d=graph.date(1,1):graph.date(end,1);
a=datevec(d);
[ii,jj]=unique(a(:,1));
set(gca,'xtick',d(jj),'xlim',[graph.date(1,1) graph.date(end,1)]);
leg=legend('S&P 500','Volume','Price earning','Volatility 90 days','location','northwest');
set(leg,'FontSize',14);
grid on;