Morgan Stanley (MS, news, chart, volatility) implied volatility is moving a bit higher amid active put buying Friday. After hitting a three-week high of $15.75 early in the session, MS has given back its gains and is down 64 cents to $14.30. In the options market, January 10 puts are the most actives. 16,400 have traded and about two thirds have hit ask-side. Implied volatility is back up to 131, from 125 the day before; but also well off the 52-week high of more than 340 set on October 10.