Tronox ( TRX), which makes titanium dioxide pigment, announced cost increases for the second quarter and said it would cut 13% of its workforce and suspend its pension plan. Shares dropped 14.7% to $3.07. On the winning side, shares of Ixys ( IXYS) gained 18.5% to $9.42. The company said it made a non-GAAP profit of $5.5 million, or 17 cents a share, in the fourth quarter, a substantial increase from income of $1.7 million, or a nickel a share, a year ago. Finally, Hibbett Sports ( HIBB), a Birmingham, Ala.-based sporting goods retailer, saw shares shoot up 15.5% to $20.59. The company posted income of $9.4 million, or 32 cents a share, vs. $10.2 million, or 32 cents a share, a year ago. The Street was looking for 27 cents a share.