in an interview with "time" magazine, incoming federal reserve chairman janet yellinsays she's hopeful. the fed makes trading the jobs report more complicated. why? if friday's number is too strong, the stock market may not like it. seeing better job growth as a sign the federal reserve may pull back more on its qe. in other words, more aggressively taper. >> we do think the market's vulnerable to a pullback related to tighter financial conditions. so a strong report tomorrow, long-winded way of saying that good is going to be bad tomorrow. >> that said, anything better than 200,000 could cause that negative reaction. of course, everybody has their own idea of what a good number is. >> i think a good number for jobs is going to be plus anything above 235. >> 225 or above. >> 213. >> for "nightly business report" i'm sara eisen. >> with anticipation building about that friday jobs report, volatility was sort of low on wall street today and the markets ended the session mixed, little changed. the dow closed 18 points lower, the nasdaq touched a fresh 13-year high before retreating and fi