SECTION 6. EFFECTIVE DATE

This revenue procedure is effective June 13, 2002. Taxpayers may apply the rules in this revenue procedure for the valuation of a stock option on or after April 26, 2002.

Appendix

Term (months) 3 12 24 36 48 60 72 84 96 108 120 Volatility Spread Factor*

2002–27 I.R.B. 42 July 8, 2002

Appendix—Continued

Term (months) 3 12 24 36 48 60 72 84 96 108 120 Volatility Spread Factor* High 200% 66.8% 68.1% 70.7% 73.1% 75.0% 76.6% 77.8% 78.8% 79.5% 80.0% 80.4% 180% 64.5% 66.1% 69.1% 71.7% 73.9% 75.6% 77.0% 78.1% 78.9% 79.5% 79.9% 160% 61.8% 63.8% 67.3% 70.3% 72.7% 74.6% 76.1% 77.3% 78.2% 78.9% 79.4% 140% 58.6% 61.3% 65.3% 68.6% 71.3% 73.4% 75.1% 76.4% 77.4% 78.2% 78.8% 120% 54.9% 58.3% 63.0% 66.8% 69.7% 72.1% 73.9% 75.4% 76.6% 77.4% 78.1% 100% 50.6% 55.0% 60.4% 64.6% 67.9% 70.6% 72.6% 74.3% 75.6% 76.6% 77.3% 80% 45.3% 51.1% 57.4% 62.2% 65.9% 68.8% 71.1% 73.0% 74.4% 75.6% 76.5% 60% 39.1% 46.6% 54.0% 59.4% 63.5% 66.8% 69.4% 71.4% 73.1% 74.4% 75.4% 40% 31.7% 41.4% 50.0% 56.1% 60.7% 64.4% 67.3% 69.6% 71.5% 73.0% 74.2% 20% 23.2% 35.4% 45.3% 52.1% 57.4% 61.5% 64.8% 67.4% 69.6% 71.3% 72.7% 0% 14.3% 28.5% 39.6% 47.4% 53.3% 57.9% 61.6% 64.7% 67.1% 69.1% 70.8%

-20% 6.4% 20.8% 32.9% 41.5% 48.1% 53.4% 57.6% 61.1% 64.0% 66.4% 68.3%

-40% 1.5% 12.7% 24.8% 34.0% 41.4% 47.3% 52.2% 56.3% 59.7% 62.5% 64.8%

-60% 0.1% 5.2% 15.2% 24.3% 32.1% 38.8% 44.4% 49.1% 53.2% 56.6% 59.5%

*Spot (market) Price/Exercise Price - 1 or (S/X–1)

July 8, 2002 43 2002–27 I.R.B.