One notable metric to gauge corporate bond health was cited in the Wall Street Journal. They noted the strong fundamentals via the ratio of EBITDA to interest expense, which is starting to tick in favor for both investment- grade as well as riskier debt. Stronger fundamentals are also translating into tighter credit spreads between investment-grade corporate debt and benchmark 10-year Treasuries. "Spreads reflect strong company credit measures,†Vanguard added when considering strategies for investment-grade ...