gator; if I am correct...after the
As Gator explained, the arbs short position is AUTOMATICALLY covered the moment STLW shares are distributed. They do not take any action at all to cover, they do not have to 'buy' any shares to cover, they do not have to decide when to cover - it is automatic. The moment the STLW shares are distributed, the ARBS have no STLW position.
The arbs must then sell their METHA position to complete the arbitrage.