Vale call volume above normal and directionally bullish

Bullish option flow detected in Vale with 36,730 calls trading, 2x expected, and implied vol increasing over 1 point to 32.22%. Jan-25 15 calls and 4/12 weekly 12 puts are the most active options, with total volume in those strikes near 30,200 contracts. The Put/Call Ratio is 0.12. Earnings are expected on April 24th.