Left:origin of pre-peak uCa correlation with SALT2.4 Hubble residuals. The Spearman correlation coefficient of r_s = 0.43 indicates a moderate correlation, with the hypothesis of no correlation at > 99% confidence. Right: comparing the post-peak uTi color integrated from HST-STIS spectra with SIFTO stretch. Spectra were dereddened according to a similar procedure as the SNfactory sample and use light curve data from Maguire et al. (2012). The SNIFS sample presented here is included for comparison, with SALT2.4 x₁ values converted to SIFTO stretch using the relation provided by Guy et al. (2010). The trend with uTi agrees betwen these two data sets.