Shortsale Purchase, Refi Seasoning?

[Mehran K.]

Hi all, newbie here again :lol:
I was just wondering if there is a certain amount of time that must pass before I could refinance a loan on a home If I purchased it as a shortsale or REO.
For Example
Shortsale purchase price $260k
Market value at time of purchase $300k
A little time goes by and appreciation makes value = $340k

Is there a time limit or any restrictions on refinancing or getting a HELOC/2nd.

Thanks in advance