Welcome to the Law Firm Disrupted, a briefing from Law.com reporter Dan Packel that surveys new competitive pressures on law firms and how their managers are coping, plus insights on the tactics and tech employed by would-be disruptors. Have an opinion? Email me here. Want to be alerted to this dispatch in your inbox every Thursday? Sign up here.

Those curious about the value of publicly traded companies can turn to the stock market and see these figures updated almost every minute of every day. For obvious reasons, that’s not the case for the legal industry. Yet, just like the S&P 500, over the last several years the value of the Am Law 100 has apparently been trending sharply upward.