Open interest or OI is the total volume of open positions in the market. For example, if A is long on one lot of Nifty and B is short on 1 lot then the total open interest is calculated as one lot. Change in OI tells you if accumulation is happening or unwinding of positions is happening. It helps you to figure out what exactly is happening in the market and whether the accumulation or short covering is happening. This gives cues to the future movement of stock prices.

Symbol

18 Feb OI

17 Feb OI

Change in OI

% Change in OI

Volume (Contracts)

Underlying value

YESBANK

56603

42191

14412

34.16

52179

34.8

LICHSGFIN

21781

19465

2316

11.9

41607

363.25

APOLLOTYRE

9108

8239

869

10.55

4530

151.2

IDEA

10772

9762

1010

10.35

7940

3.05

CONCOR

4243

3932

311

7.91

1501

533

MINDTREE

2124

1971

153

7.76

4057

999

FEDERALBNK

12039

11208

831

7.41

5822

82.35

AMBUJACEM

16036

14948

1088

7.28

4178

201

RBLBANK

16608

15485

1123

7.25

18859

302.25

HINDPETRO

10920

10286

634

6.16

7156

224.45

MARUTI

50014

47287

2727

5.77

39989

6795

TATAMOTORS

35772

33981

1791

5.27

42847

162.55

MGL

5376

5108

268

5.25

6049

1139.1

INDUSINDBK

67372

64193

3179

4.95

95826

1138.15

COLPAL

6321

6045

276

4.57

1932

1326.7

INFRATEL

9142

8776

366

4.17

19412

208.35

TCS

69653

67155

2498

3.72

40561

2215

BANKNIFTY

839582

809634

29948

3.7

1,25,58,166

30562.5

IBULHSGFIN

34611

33394

1217

3.64

47097

300.9

MFSL

6482

6280

202

3.22

5356

501.2

BANKBARODA

23456

22735

721

3.17

21864

81

TATAGLOBAL

12364

11990

374

3.12

20196

382.45

TVSMOTOR

5683

5514

169

3.06

5557

440

PAGEIND

6575

6386

189

2.96

1611

22850

DLF

18522

18017

505

2.8

10341

218.95

HDFCBANK

88005

85711

2294

2.68

32924

1217.05

VOLTAS

5628

5493

135

2.46

4673

696.75

IDFCFIRSTB

25885

25282

603

2.39

6654

38.65

IGL

7437

7266

171

2.35

10233

470.5

BPCL

24563

24017

546

2.27

22466

472.3

PIDILITIND

5674

5552

122

2.2

2481

1580

HEROMOTOCO

29441

28820

621

2.15

22573

2249.95

ADANIPOWER

8921

8734

187

2.14

3435

56.55

NIFTY

1673298

1641074

32224

1.96

6555019

11992.5

OIL

4736

4652

84

1.81

2052

133.2

M&MFIN

10270

10089

181

1.79

3822

372.85

JINDALSTEL

10062

9896

166

1.68

10084

185.8

INDIGO

15905

15653

252

1.61

9102

1473.65

TATASTEEL

33190

32668

522

1.6

42386

432.65

SRTRANSFIN

13062

12859

203

1.58

7169

1265.2

MCDOWELL-N

13045

12849

196

1.53

12014

727

SRF

6556

6470

86

1.33

4740

4165

LUPIN

15755

15555

200

1.29

6854

703.1

TECHM

14513

14334

179

1.25

5441

838.55

IOC

18687

18457

230

1.25

7812

112.7

GRASIM

40387

39900

487

1.22

7508

723.55

GMRINFRA

5156

5094

62

1.22

1152

22.6

ASHOKLEY

16679

16484

195

1.18

11516

80.5

CENTURYTEX

9106

9008

98

1.09

4075

583.4

HDFC

154832

153172

1660

1.08

36664

2324.05

NESTLEIND

11125

11007

118

1.07

2509

16417.5

NTPC

32332

31990

342

1.07

17844

110.3

SBIN

84037

83175

862

1.04

109710

318.05

ICICIPRULI

8411

8327

84

1.01

3141

472.9

EQUITAS

5221

5169

52

1.01

1887

106.7

KOTAKBANK

33232

32905

327

0.99

22206

1692.95

BRITANNIA

17480

17320

160

0.92

6489

3075

CANBK

13438

13325

113

0.85

11688

172.7

BATAINDIA

7032

6987

45

0.64

5344

1793.55

RELIANCE

126602

125821

781

0.62

61108

1466.9

CUMMINSIND

3118

3104

14

0.45

1370

531.05

JUBLFOOD

9021

8986

35

0.39

10869

1834

HINDALCO

18621

18555

66

0.36

11950

184.8

UJJIVAN

5521

5504

17

0.31

3415

385

CESC

2933

2926

7

0.24

1335

686

PFC

9009

8989

20

0.22

5518

128

WIPRO

8526

8510

16

0.19

1534

244

ADANIPORTS

14364

14349

15

0.1

4421

368

SUNPHARMA

66795

66739

56

0.08

15163

406.1

ESCORTS

9065

9059

6

0.07

13846

894

NIFTYIT

170

170

0

0

67

16748.75

NIITTECH

3240

3242

-2

-0.06

1823

1850

NMDC

10037

10052

-15

-0.15

4336

99.65

ITC

92413

92661

-248

-0.27

29842

204.05

AUROPHARMA

21342

21401

-59

-0.28

17222

502.55

UBL

4270

4283

-13

-0.3

859

1264.55

MRF

2519

2528

-9

-0.36

981

69608.55

BALKRISIND

3964

3979

-15

-0.38

9934

1238

ADANIENT

8885

8919

-34

-0.38

5097

248.9

DRREDDY

14217

14273

-56

-0.39

10186

3253

MUTHOOTFIN

8841

8877

-36

-0.41

65808

863.9

EXIDEIND

6974

7004

-30

-0.43

2620

177.5

BERGEPAINT

4555

4576

-21

-0.46

1998

580

M&M

31253

31400

-147

-0.47

11831

523.2

BHEL

16285

16369

-84

-0.51

8336

34.8

INFY

33967

34149

-182

-0.53

16929

798.5

SUNTV

9421

9472

-51

-0.54

6576

472.25

CHOLAFIN

2902

2918

-16

-0.55

1004

328

TATACHEM

6775

6813

-38

-0.56

2838

750

VEDL

31065

31240

-175

-0.56

14304

140.7

TATAPOWER

9628

9687

-59

-0.61

2017

51.5

BOSCHLTD

3555

3584

-29

-0.81

739

14600

BEL

12307

12410

-103

-0.83

5914

83.85

SAIL

9487

9574

-87

-0.91

7588

42.05

ZEEL

24121

24352

-231

-0.95

14197

245.7

NATIONALUM

5800

5856

-56

-0.96

1621

39.1

BAJAJFINSV

10826

10951

-125

-1.14

5071

9550

GODREJCP

11456

11625

-169

-1.45

2210

623.05

HCLTECH

18363

18640

-277

-1.49

5652

609.8

PETRONET

8438

8581

-143

-1.67

1911

259.8

HAVELLS

8344

8494

-150

-1.77

3867

602

DABUR

12625

12853

-228

-1.77

3467

506

ASIANPAINT

15619

15916

-297

-1.87

4913

1869.25

SHREECEM

3377

3444

-67

-1.95

952

23912.85

ONGC

32313

32969

-656

-1.99

17077

99.5

PNB

22724

23215

-491

-2.12

12099

52.45

AXISBANK

52935

54104

-1169

-2.16

27127

735.5

RECLTD

6368

6511

-143

-2.2

3695

137.2

COALINDIA

33302

34072

-770

-2.26

25225

172.75

PVR

4078

4173

-95

-2.28

1477

2088

ULTRACEMCO

16046

16443

-397

-2.41

6837

4470.7

EICHERMOT

16647

17063

-416

-2.44

9139

18751.25

L&TFH

7361

7548

-187

-2.48

6009

122.3

DIVISLAB

6178

6337

-159

-2.51

4127

2170

ICICIBANK

90095

92456

-2361

-2.55

43472

540.9

BAJAJ-AUTO

9213

9462

-249

-2.63

4403

3086

BHARATFORG

7190

7393

-203

-2.75

2840

481.9

LT

76402

78614

-2212

-2.81

31324

1288

BHARTIARTL

43062

44342

-1280

-2.89

58757

549

TORNTPHARM

986

1016

-30

-2.95

761

2133.5

BAJFINANCE

36692

37809

-1117

-2.95

27912

4770

AMARAJABAT

2513

2594

-81

-3.12

1788

780

ACC

15077

15564

-487

-3.13

8057

1421.1

MARICO

14097

14565

-468

-3.21

3601

300

RAMCOCEM

1828

1890

-62

-3.28

693

789.8

HINDUNILVR

42508

43956

-1448

-3.29

15327

2241.5

CIPLA

16336

16905

-569

-3.37

4915

437

TORNTPOWER

2532

2621

-89

-3.4

2327

310

POWERGRID

17936

18594

-658

-3.54

6752

185.2

SIEMENS

6436

6674

-238

-3.57

2865

1397.8

JUSTDIAL

4879

5069

-190

-3.75

6913

486.85

PEL

18139

18872

-733

-3.88

10805

1530

UPL

18715

19473

-758

-3.89

8613

584.85

TITAN

16402

17088

-686

-4.01

12446

1311

JSWSTEEL

27566

28738

-1172

-4.08

10889

285

MOTHERSUMI

6370

6672

-302

-4.53

8144

123.3

GLENMARK

8655

9067

-412

-4.54

6689

311.6

MANAPPURAM

8793

9238

-445

-4.82

10406

170.45

BIOCON

8922

9447

-525

-5.56

7985

301.6

CADILAHC

4778

5175

-397

-7.67

2115

267.8

APOLLOHOSP

6496

7036

-540

-7.67

15742

1773.3

NCC

9415

10908

-1493

-13.69

4833

41.95

GAIL

11956

14720

-2764

-18.78

5377

119.75

As the above table shows, it is clear how the OI has moved. But you must always correlate the OI shift with the change in the market prices as it gives you the precise picture of the market.