Ariad Pharmaceuticals Inc fka ARIA

[Whosetosay]

Interpreting the trade is a bit difficult. The puts certainly appear to have been sold

says Optionmaster.

It's interesting to note that they cannot identify these trades as buys or sells with any more conviction than we do with our best guesses.

I still think your point about the trades linked to the big buy yesterday is exactly correct (note Optionmaster made no such connection), and perhaps it's a hedge, or perhaps it's a pps reducing ploy, either way, it's bullish on the stock buy underpinning.