Exelon Generation 8-K/A Regulation FD Disclosure

6

$4,450

$2,740

$920

$700

Cash Flow from Operations

(1)

($3,120)

($1,600)

($390)

($1,000)

Capital Expenditures

$1,220

$1,240

($50)

$300

Net Financing (excluding Dividend)

(2)

$2,550

$2,380

$480

$0

Cash available before Dividend

($1,310)

Dividend

(3)

$1,240

Cash available after Dividend

Exelon

(4)

($ in Millions)

2008 Projected Sources and Uses of Cash

(1)

Cash

Flow

from

Operations

=

Net

cash

flows

provided

by

operating

activities

less

net

cash

flows

used

in

investing

activities

other

than

capital

expenditures.

(2)

Net Financing (excluding Dividend) = Net cash flows used in financing activities excluding dividends paid on common and preferred stock.

(3)

Assumes 2008 Dividend of $2.00 per share.

(4)

Includes cash flow activity from Holding Company, eliminations, and other corporate entities.

Exhibit 99.1

38

Current Market Prices

1.

2004, 2005 and 2006 are actual settled prices.

2.

Real Time LMP (Locational Marginal Price).

3.

Next day over-the-counter market.

4.

Average NYMEX settled prices.

5.

2007 information is a combination of actual prices through 12/14/07 and market prices for the balance of the year.

6.

2008 and 2009 are forward market prices as of 12/14/07.

PRICES (as of December 14, 2007)

Units

2004

1

2005

2006

2007

5

2008

6

2009

6

PJM West Hub ATC

($/MWh)

42.35

60.92

51.07

2

60.52

62.79

67.12

PJM NiHub

ATC

($/MWh)

30.15

46.39

41.42

46.20

48.17

51.30

NEPOOL MASS Hub ATC

($/MWh)

52.13

76.65

59.68

68.03

74.07

77.81

ERCOT North On-Peak

($/MWh)

49.53

76.90

60.87

3

59.53

66.22

75.15

Henry Hub Natural Gas

($/MMBTU)

5.85

4

8.85

4

6.74

4

6.97

7.45

8.18

WTI Crude Oil

($/bbl)

41.48

4

56.62

4

66.38

4

69.72

90.50

87.48

PRB 8800

($/Ton)

5.97

8.06

13.04

9.67

12.03

12.18

NAPP 3.0

($/Ton)

60.25

52.42

43.87

47.54

57.62

55.08

ATC HEAT RATES (as of December 14, 2007)

PJM West Hub / Tetco

M3

(MMBTU/MWh)

6.40

6.30

6.98

7.77

7.45

7.31

PJM NiHub

/ Chicago City Gate

(MMBTU/MWh)

5.52

5.52

6.32

6.74

6.46

6.23

ERCOT North / Houston Ship Channel

(MMBTU/MWh)

7.53

8.21

8.28

8.97

7.85

7.96

1

1

2

2

2

2

2

2

2

3

2

3