By its name alone, HFF Inc. likely doesn’t turn investors’ heads quickly around. But in light of today’s topsy-turvy market, the stock’s fortitude lately should serve as a true head-turner. With the current outlook in IBD’s Market Pulse table now at “uptrend under pressure,” it should come as no surprise that the Nasdaq, S&P 500 and the NYSE composite have again slumped below their 50-day and 10-week moving averages.