VOL. XLIII

No. 23

5-June-2000

OPEC

Crude Oil Formulas/Posted Prices

OPEC 20-Day Basket Average

Price Avg

Date

($/B)

Daily

1 June

28.55

20-Day Avg*

5 May -1 June

27.65

Weekly Avg

22 May 25 May

27.99

Monthly Avg

Apr

22.93

Quarterly Avg

1Q

26.11

Year to Date Avg

25.60

Source: OPEC

The 20-day average is calculated from prices for the last 20 business days.

Libya (Dated Brent +/- Adjustment Factor; $/B)

1999

2000

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Jun

Zueitina (41º)

-0.15

-0.15

+0.05

+0.25

+0.25

+0.35

-0.10

-0.10

+0.10

Brega (40º)

+0.15

+0.15

+0.35

...