Risk expert Leo Tilman on the best way to approach market instability

Berkshire Hathaway's Warren Buffett said he has not made any purchases recently because there are no attractive opportunities. Leo Tilman, risk expert and CEO of the strategic advisory firm Tilman & Co. and co-author of "Agility: How to Navigate the Unknown and Seize Opportunity in a World of Disruption," joins "Squawk Box" to discuss risk in the markets.