NEW YORK (TheStreet) -- One day after hitting 5000, the Nasdaq is down Tuesday. But don't be too concerned - it's not unusual for the market to hit a key psychological level and then fall, said Stephen Weiss, founder and managing partner of Short Hills Capital Partners LLC, on CNBC's "Fast Money Halftime." Risk has gotten "very cheap," Weiss continued, noting the volatility index is now trading near the lowest levels of 2015.