I think PEG will be much harder to calculate in 2016 and beyond. - We could be facing competition. Which would pressure margins. - We don't know how fast the market will get saturated. And I prefer not to rely on estimates from management or analysts.
You're saying a 20% growth rate in 2016 and beyond. Ok, that should give us a P/E of 20. EPS should be close to $3 in 2016 which makes it a $60 stock. What's the difference with my $34 now? (Or $17 when applying a 50% discount). If SIAF is trading at $34 today (or $17) then it's still a buy. Which is the whole point of looking at PEG because it accounts for exponential growth.