It will never be as critical as a capital ratio or foretelling as a net chargeoff ratio, but to gauge PNC Financial Services Group Inc.'s progress with its National City Corp. acquisition, consider PNC's square footage per employee.

It seems like an unlikely ratio to draw concerns from PNC executives at the moment — until one considers what is at stake.

Subscribe Now

Access to authoritative analysis and perspective and our data-driven report series.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.