how long before i can sell an investment property..

[Riccardo Dux]

i bought a investment property in the state of new york and i plan on flipping it but my mortgage broker told  me that i need to hold on to it for a period of six months before i can sell. I tried looking up on the web as to why i would need to hold on to it for that period and im not seeing any information supporting that six month claim. So my question is can i sell my mortgaged investment property in less then six months to lower my holding costs?