Crisil Ratings said the Reserve Bank of India's recent guidelines on gold loans will support growth in non-banking finance companies offering such products, despite changes in how loan-to-value (LTV) is calculated for bullet repayment loans.Under the revised norms, NBFCs must factor in accrued interest at maturity when computing the LTV, rather than just the disbursed principal. However, an increase in the LTV ceilings will help mitigate this impact, the agency said.