Updated from 3:26 p.m. ESTWhile analysts and investors debate whether the recent rally is sustainable, a host of companies seized the opportunity to raise cash by offering stock and debt to the public. After almost grinding to a halt this summer, the IPO and follow-on markets have been invigorated this month, with 46 issues debuting so far, according to Dealogic. That's the highest number since June, when 79 deals were sold. Just this past week, a bevy of new stock sales were priced, with IPOs coming from Safety Insurance Group ( SAFT), restaurant chain Cosi ( COSI) and Impac Medical ( IMPC). Meanwhile, Macerich Co. ( MAC), Great Plains Energy ( GXP), Myriad Genetics ( MYGN) and a slew of other firms embarked on secondary offerings in a sign that demand may finally be picking up.