EQUITY AND STOCK-BASED COMPENSATION (Tables)
 3 Months Ended
Mar. 28, 2020
Equity [Abstract]  
Schedule of weighted average shares outstanding used in computation of basic and diluted income (loss) per share
The following table sets forth the number of weighted-average shares outstanding used in the computation of basic and diluted income (loss) per share:
Three months ended
March 28, 2020March 30, 2019
Weighted-average shares outstanding, basic42.57042.452
Dilutive effect of share-based awards—  0.125  
Weighted-average shares outstanding, dilutive(1)
42.57042.577
(1)For the three months ended March 28, 2020, an aggregate of 0.637 unvested restricted stock shares, restricted stock units and stock options outstanding were excluded from the computation of diluted loss per share as we incurred a net loss during the period. For the three months ended March 28, 2020, the number of anti-dilutive unvested restricted stock shares and restricted stock units outstanding excluded from the computation of diluted loss per share was 0.427. Unvested restricted stock shares/units not included in the computation of diluted income per share because required market thresholds for vesting (as discussed below) were not met, were 0.202 for the three months ended March 30, 2019. Unvested restricted stock shares/units not included in the computation of diluted income per share because required internal performance thresholds for vesting (as discussed below) were not met, were 0.151 for the three months ended March 30, 2019. Stock options outstanding excluded from the computation of diluted income per share because their exercise price was greater than the average market price of common shares, were 0.342 for the three months ended March 30, 2019.
Schedule of compensation expense related to share-based programs recognized in selling, general and administrative expense For the three months ended March 28, 2020 and March 30, 2019, we recognized compensation expense related to share-based programs in “Selling, general and administrative” expense in the accompanying condensed consolidated statements of operations as follows:
Three months ended
March 28, 2020March 30, 2019
Stock-based compensation expense - continuing and discontinued operations$4.0  $3.2  
Less: stock-based compensation expense recognized in discontinued operations0.8  0.3  
Stock-based compensation expense recognized in continuing operations3.2  2.9  
Income tax benefit(0.8) (0.7) 
Stock-based compensation expense, net of income tax benefit$2.4  $2.2  
Summary of restricted stock share and restricted stock unit activity
The following table summarizes the unvested restricted stock share and restricted stock unit activity for the three months ended March 28, 2020:
Unvested Restricted Stock Shares and Restricted Stock UnitsWeighted-Average Grant-Date Fair Value Per Share
Outstanding at December 31, 20190.999$38.24
Granted0.44935.37
Vested(0.383)36.87
Forfeited and other(0.035)41.03
Outstanding at March 28, 20201.030$37.40
Assumptions used in determining fair value of awards granted The following assumptions were used in determining the fair value of the awards granted on the date indicated below:
Annual Expected Stock Price VolatilityAnnual Expected Dividend YieldRisk-free Interest RateCorrelations Between Total Shareholder Return for SPX FLOW and Individual Companies in the Composite Group
MinimumAverageMaximum
March 5, 2020:
SPX FLOW35.8 %— %1.14 %0.1110  0.4167  0.7351  
Composite Group29.9 %n/a  1.14 %