(Bloomberg) -- Some investors in US initial public offerings are demanding rules what they see as unequal treatment in the rules around how stock is allocated to so-called cornerstone investors in new listings.Most Read from BloombergChina Weighs Stock Market Rescue Package Backed by $278 BillionApple Dials Back Car’s Self-Driving Features and Delays Launch to 2028Netflix Pays $5 Billion for ‘Raw’ in Bet on Live EventsAn Isolated Israel Doubles Down on War in Gaza — At All CostsIndia Tops Hong K